./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.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/mutex-meet-nonrel/safe002_rmo.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/safe002_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_rmo.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 21:31:12,396 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:31:12,451 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:31:12,454 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:31:12,455 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:31:12,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:31:12,476 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:31:12,477 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:31:12,477 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:31:12,477 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:31:12,477 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:31:12,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:31:12,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:31:12,483 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:31:12,484 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:31:12,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:31:12,485 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:31:12,485 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:31:12,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:31:12,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:31:12,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:31:12,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:31:12,487 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:31:12,487 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:31:12,487 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:31:12,487 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:31:12,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:31:12,488 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:31:12,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:31:12,488 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:31:12,488 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:31:12,488 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:31:12,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:31:12,489 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:31:12,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:31:12,489 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:31:12,489 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:31:12,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:31:12,490 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:31:12,490 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:31:12,490 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:31:12,491 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:31:12,491 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:31:12,491 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:31:12,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:31:12,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:31:12,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:31:12,657 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:31:12,657 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:31:12,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-21 21:31:13,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:31:13,818 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:31:13,819 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-21 21:31:13,831 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da96a15de/8bf4f80ed5424a04926cb60162f17944/FLAG9d06bccdb [2024-06-21 21:31:13,840 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da96a15de/8bf4f80ed5424a04926cb60162f17944 [2024-06-21 21:31:13,842 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:31:13,842 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:31:13,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_rmo.oepc.yml/witness.yml [2024-06-21 21:31:14,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:31:14,033 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:31:14,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:31:14,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:31:14,039 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:31:14,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:31:13" (1/2) ... [2024-06-21 21:31:14,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25eca7fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:14, skipping insertion in model container [2024-06-21 21:31:14,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:31:13" (1/2) ... [2024-06-21 21:31:14,045 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e2b77b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:31:14, skipping insertion in model container [2024-06-21 21:31:14,045 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:31:14" (2/2) ... [2024-06-21 21:31:14,046 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25eca7fa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14, skipping insertion in model container [2024-06-21 21:31:14,046 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:31:14" (2/2) ... [2024-06-21 21:31:14,046 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:31:14,158 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:31:14,159 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__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) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:31:14,160 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_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) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:31:14,160 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__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) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:31:14,160 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:31:14,160 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-21 21:31:14,196 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:31:14,496 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:31:14,508 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:31:14,655 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:31:14,694 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:31:14,694 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14 WrapperNode [2024-06-21 21:31:14,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:31:14,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:31:14,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:31:14,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:31:14,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,715 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,745 INFO L138 Inliner]: procedures = 175, calls = 107, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-21 21:31:14,746 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:31:14,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:31:14,747 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:31:14,747 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:31:14,755 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,767 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,783 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-21 21:31:14,784 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,784 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,796 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,798 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,801 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,803 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,808 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:31:14,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:31:14,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:31:14,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:31:14,809 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (1/1) ... [2024-06-21 21:31:14,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:31:14,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:31:14,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:31:14,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:31:14,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:31:14,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:31:14,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:31:14,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:31:14,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:31:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:31:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:31:14,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:31:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:31:14,877 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:31:14,877 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:31:14,878 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:31:14,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:31:14,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:31:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:31:14,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:31:14,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:31:14,881 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:31:15,034 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:31:15,035 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:31:15,529 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:31:15,529 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:31:15,965 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:31:15,966 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:31:15,966 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:31:15 BoogieIcfgContainer [2024-06-21 21:31:15,966 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:31:15,969 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:31:15,969 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:31:15,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:31:15,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:31:13" (1/4) ... [2024-06-21 21:31:15,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b942c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:31:15, skipping insertion in model container [2024-06-21 21:31:15,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:31:14" (2/4) ... [2024-06-21 21:31:15,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b942c1e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:31:15, skipping insertion in model container [2024-06-21 21:31:15,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:31:14" (3/4) ... [2024-06-21 21:31:15,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b942c1e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:31:15, skipping insertion in model container [2024-06-21 21:31:15,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:31:15" (4/4) ... [2024-06-21 21:31:15,974 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_rmo.oepc.i [2024-06-21 21:31:15,988 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:31:15,988 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:31:15,988 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:31:16,041 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:31:16,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:31:16,104 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:31:16,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:31:16,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:31:16,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:31:16,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:31:16,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:31:16,146 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;@470f180f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:31:16,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:31:16,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:31:16,152 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:31:16,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:31:16,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:16,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:31:16,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:16,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:16,159 INFO L85 PathProgramCache]: Analyzing trace with hash 906645505, now seen corresponding path program 1 times [2024-06-21 21:31:16,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:16,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887708325] [2024-06-21 21:31:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:16,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:17,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887708325] [2024-06-21 21:31:17,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887708325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:17,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:17,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:31:17,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753650030] [2024-06-21 21:31:17,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:17,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:31:17,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:17,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:31:17,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:31:17,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:31:17,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:17,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:17,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:31:17,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:18,398 INFO L124 PetriNetUnfolderBase]: 1097/1694 cut-off events. [2024-06-21 21:31:18,398 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-21 21:31:18,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1694 events. 1097/1694 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8167 event pairs, 643 based on Foata normal form. 2/1663 useless extension candidates. Maximal degree in co-relation 3411. Up to 1653 conditions per place. [2024-06-21 21:31:18,410 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 21:31:18,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-21 21:31:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:31:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:31:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-21 21:31:18,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 21:31:18,422 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-21 21:31:18,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-21 21:31:18,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:18,427 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:31:18,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:31:18,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:31:18,432 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:31:18,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:18,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:18,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:18,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:31:18,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:18,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash -591977984, now seen corresponding path program 1 times [2024-06-21 21:31:18,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:18,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746528983] [2024-06-21 21:31:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:18,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:20,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:20,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746528983] [2024-06-21 21:31:20,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746528983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:20,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:20,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:31:20,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727956434] [2024-06-21 21:31:20,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:20,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:31:20,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:20,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:31:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:31:20,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:31:20,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:20,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:20,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:31:20,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:20,993 INFO L124 PetriNetUnfolderBase]: 1088/1681 cut-off events. [2024-06-21 21:31:20,993 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-06-21 21:31:20,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 1681 events. 1088/1681 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8204 event pairs, 496 based on Foata normal form. 4/1684 useless extension candidates. Maximal degree in co-relation 3866. Up to 1616 conditions per place. [2024-06-21 21:31:21,000 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 21:31:21,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-21 21:31:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:31:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:31:21,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 21:31:21,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-21 21:31:21,002 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-21 21:31:21,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-21 21:31:21,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:31:21,003 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 21:31:21,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 21:31:21,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 21:31:21,004 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 21:31:21,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:21,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:21,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:21,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:31:21,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:21,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash -478703922, now seen corresponding path program 1 times [2024-06-21 21:31:21,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:21,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919183172] [2024-06-21 21:31:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:21,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:23,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:23,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919183172] [2024-06-21 21:31:23,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919183172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:23,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:23,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:31:23,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613718086] [2024-06-21 21:31:23,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:23,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:31:23,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:23,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:31:23,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:31:23,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:31:23,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:23,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:23,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:31:23,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:24,723 INFO L124 PetriNetUnfolderBase]: 1377/2089 cut-off events. [2024-06-21 21:31:24,723 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2024-06-21 21:31:24,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 2089 events. 1377/2089 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9831 event pairs, 416 based on Foata normal form. 8/2096 useless extension candidates. Maximal degree in co-relation 5309. Up to 1964 conditions per place. [2024-06-21 21:31:24,734 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-21 21:31:24,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 398 flow [2024-06-21 21:31:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 21:31:24,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:31:24,745 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 126 transitions. [2024-06-21 21:31:24,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 398 flow [2024-06-21 21:31:24,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 378 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 21:31:24,748 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 21:31:24,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 21:31:24,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 21:31:24,749 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 21:31:24,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:24,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:24,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:24,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:31:24,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:24,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1961594941, now seen corresponding path program 1 times [2024-06-21 21:31:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:24,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229316126] [2024-06-21 21:31:24,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:24,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:26,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229316126] [2024-06-21 21:31:26,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229316126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:26,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:26,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:31:26,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40122231] [2024-06-21 21:31:26,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:26,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:31:26,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:31:26,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:31:26,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:26,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:26,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:26,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:26,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:26,971 INFO L124 PetriNetUnfolderBase]: 1369/2078 cut-off events. [2024-06-21 21:31:26,972 INFO L125 PetriNetUnfolderBase]: For 2042/2042 co-relation queries the response was YES. [2024-06-21 21:31:26,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5812 conditions, 2078 events. 1369/2078 cut-off events. For 2042/2042 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9784 event pairs, 527 based on Foata normal form. 3/2080 useless extension candidates. Maximal degree in co-relation 5795. Up to 2033 conditions per place. [2024-06-21 21:31:26,979 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-21 21:31:26,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 349 flow [2024-06-21 21:31:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:31:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:31:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 21:31:26,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:31:26,981 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 87 transitions. [2024-06-21 21:31:26,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 349 flow [2024-06-21 21:31:26,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 322 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:26,985 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 21:31:26,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 21:31:26,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 21:31:26,986 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 21:31:26,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:26,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:26,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:26,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:31:26,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:26,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash -679899700, now seen corresponding path program 1 times [2024-06-21 21:31:26,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:26,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876342670] [2024-06-21 21:31:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:26,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:28,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:28,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876342670] [2024-06-21 21:31:28,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876342670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:28,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:28,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:31:28,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575743980] [2024-06-21 21:31:28,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:28,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:31:28,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:28,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:31:28,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:31:28,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:28,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:28,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:28,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:28,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:29,617 INFO L124 PetriNetUnfolderBase]: 1359/2062 cut-off events. [2024-06-21 21:31:29,617 INFO L125 PetriNetUnfolderBase]: For 2884/2884 co-relation queries the response was YES. [2024-06-21 21:31:29,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 2062 events. 1359/2062 cut-off events. For 2884/2884 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9487 event pairs, 566 based on Foata normal form. 4/2065 useless extension candidates. Maximal degree in co-relation 6181. Up to 2005 conditions per place. [2024-06-21 21:31:29,629 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-21 21:31:29,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 430 flow [2024-06-21 21:31:29,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:31:29,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 21:31:29,634 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:31:29,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 430 flow [2024-06-21 21:31:29,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 403 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:29,642 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-21 21:31:29,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-21 21:31:29,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 21:31:29,645 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-21 21:31:29,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:29,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:29,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:29,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:31:29,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:29,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:29,646 INFO L85 PathProgramCache]: Analyzing trace with hash 392225282, now seen corresponding path program 1 times [2024-06-21 21:31:29,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:29,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85097858] [2024-06-21 21:31:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:31,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:31,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85097858] [2024-06-21 21:31:31,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85097858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:31,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:31,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:31:31,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154845245] [2024-06-21 21:31:31,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:31,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:31:31,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:31:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:31:31,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:31,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:31,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:31,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:31,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:33,024 INFO L124 PetriNetUnfolderBase]: 1377/2091 cut-off events. [2024-06-21 21:31:33,025 INFO L125 PetriNetUnfolderBase]: For 4101/4103 co-relation queries the response was YES. [2024-06-21 21:31:33,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 2091 events. 1377/2091 cut-off events. For 4101/4103 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9774 event pairs, 507 based on Foata normal form. 5/2095 useless extension candidates. Maximal degree in co-relation 6803. Up to 1985 conditions per place. [2024-06-21 21:31:33,037 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-21 21:31:33,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 557 flow [2024-06-21 21:31:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 21:31:33,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:31:33,040 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 111 transitions. [2024-06-21 21:31:33,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 557 flow [2024-06-21 21:31:33,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 551 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 21:31:33,045 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-21 21:31:33,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-21 21:31:33,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 21:31:33,048 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-21 21:31:33,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:33,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:33,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:33,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:31:33,048 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:33,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:33,049 INFO L85 PathProgramCache]: Analyzing trace with hash 885022052, now seen corresponding path program 2 times [2024-06-21 21:31:33,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:33,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417468021] [2024-06-21 21:31:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:33,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:35,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:35,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417468021] [2024-06-21 21:31:35,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417468021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:35,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:35,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:31:35,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015888768] [2024-06-21 21:31:35,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:35,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:31:35,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:31:35,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:31:35,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:35,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:35,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:35,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:35,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:36,298 INFO L124 PetriNetUnfolderBase]: 1369/2081 cut-off events. [2024-06-21 21:31:36,298 INFO L125 PetriNetUnfolderBase]: For 5638/5640 co-relation queries the response was YES. [2024-06-21 21:31:36,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 2081 events. 1369/2081 cut-off events. For 5638/5640 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9733 event pairs, 510 based on Foata normal form. 5/2085 useless extension candidates. Maximal degree in co-relation 7303. Up to 1978 conditions per place. [2024-06-21 21:31:36,309 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 21:31:36,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 563 flow [2024-06-21 21:31:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:31:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:31:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:31:36,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:31:36,311 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:31:36,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 563 flow [2024-06-21 21:31:36,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 530 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 21:31:36,317 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-21 21:31:36,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-21 21:31:36,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 21:31:36,318 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-21 21:31:36,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:36,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:36,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:36,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:31:36,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:36,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:36,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1603429801, now seen corresponding path program 1 times [2024-06-21 21:31:36,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:36,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652628727] [2024-06-21 21:31:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:36,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:39,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:39,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652628727] [2024-06-21 21:31:39,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652628727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:39,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:39,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:39,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713926772] [2024-06-21 21:31:39,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:39,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:39,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:39,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:39,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:39,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:39,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:39,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:39,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:40,969 INFO L124 PetriNetUnfolderBase]: 1447/2205 cut-off events. [2024-06-21 21:31:40,969 INFO L125 PetriNetUnfolderBase]: For 6827/6829 co-relation queries the response was YES. [2024-06-21 21:31:40,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 2205 events. 1447/2205 cut-off events. For 6827/6829 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10375 event pairs, 504 based on Foata normal form. 5/2209 useless extension candidates. Maximal degree in co-relation 7874. Up to 2064 conditions per place. [2024-06-21 21:31:40,983 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 83 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-21 21:31:40,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 767 flow [2024-06-21 21:31:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:31:40,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:31:40,986 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:31:40,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 767 flow [2024-06-21 21:31:40,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 703 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:40,993 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 477 flow [2024-06-21 21:31:40,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-21 21:31:40,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 21:31:40,995 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 477 flow [2024-06-21 21:31:40,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:40,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:40,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:31:40,995 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:40,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash -726036975, now seen corresponding path program 2 times [2024-06-21 21:31:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:40,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006951808] [2024-06-21 21:31:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:43,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006951808] [2024-06-21 21:31:43,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006951808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:43,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:43,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:43,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80989013] [2024-06-21 21:31:43,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:43,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:43,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:43,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:43,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:43,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:43,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 477 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:43,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:43,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:43,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:44,971 INFO L124 PetriNetUnfolderBase]: 1465/2243 cut-off events. [2024-06-21 21:31:44,971 INFO L125 PetriNetUnfolderBase]: For 8828/8832 co-relation queries the response was YES. [2024-06-21 21:31:44,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8693 conditions, 2243 events. 1465/2243 cut-off events. For 8828/8832 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10609 event pairs, 486 based on Foata normal form. 7/2249 useless extension candidates. Maximal degree in co-relation 8664. Up to 2064 conditions per place. [2024-06-21 21:31:44,983 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-21 21:31:44,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 839 flow [2024-06-21 21:31:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:31:44,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 21:31:44,984 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 477 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:31:44,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 839 flow [2024-06-21 21:31:44,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 793 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:44,992 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 534 flow [2024-06-21 21:31:44,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=534, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-21 21:31:44,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-21 21:31:44,992 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 534 flow [2024-06-21 21:31:44,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:44,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:44,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:44,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:31:44,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:44,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:44,993 INFO L85 PathProgramCache]: Analyzing trace with hash -725917005, now seen corresponding path program 3 times [2024-06-21 21:31:44,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:44,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242050574] [2024-06-21 21:31:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:44,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:47,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242050574] [2024-06-21 21:31:47,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242050574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:47,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:47,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862037051] [2024-06-21 21:31:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:47,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:47,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:47,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:47,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 534 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:47,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:47,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:47,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:49,058 INFO L124 PetriNetUnfolderBase]: 1483/2269 cut-off events. [2024-06-21 21:31:49,058 INFO L125 PetriNetUnfolderBase]: For 11568/11572 co-relation queries the response was YES. [2024-06-21 21:31:49,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9355 conditions, 2269 events. 1483/2269 cut-off events. For 11568/11572 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10740 event pairs, 506 based on Foata normal form. 5/2273 useless extension candidates. Maximal degree in co-relation 9325. Up to 1998 conditions per place. [2024-06-21 21:31:49,068 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 40 changer transitions 0/117 dead transitions. [2024-06-21 21:31:49,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 962 flow [2024-06-21 21:31:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:31:49,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 21:31:49,070 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 534 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:31:49,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 962 flow [2024-06-21 21:31:49,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 899 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:31:49,077 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 633 flow [2024-06-21 21:31:49,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=633, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2024-06-21 21:31:49,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 21:31:49,078 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 633 flow [2024-06-21 21:31:49,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:49,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:49,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:49,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:31:49,079 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:49,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash -171857285, now seen corresponding path program 1 times [2024-06-21 21:31:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:49,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688704792] [2024-06-21 21:31:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:49,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:51,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:51,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688704792] [2024-06-21 21:31:51,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688704792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:51,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:51,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:51,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185030362] [2024-06-21 21:31:51,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:51,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:51,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:51,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:51,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:51,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:51,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 633 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:51,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:51,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:51,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:52,843 INFO L124 PetriNetUnfolderBase]: 1711/2598 cut-off events. [2024-06-21 21:31:52,843 INFO L125 PetriNetUnfolderBase]: For 15803/15809 co-relation queries the response was YES. [2024-06-21 21:31:52,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11040 conditions, 2598 events. 1711/2598 cut-off events. For 15803/15809 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12395 event pairs, 510 based on Foata normal form. 16/2613 useless extension candidates. Maximal degree in co-relation 11009. Up to 2270 conditions per place. [2024-06-21 21:31:52,854 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 107 selfloop transitions, 36 changer transitions 0/147 dead transitions. [2024-06-21 21:31:52,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 147 transitions, 1223 flow [2024-06-21 21:31:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:31:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:31:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:31:52,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 21:31:52,856 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 633 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:31:52,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 147 transitions, 1223 flow [2024-06-21 21:31:52,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 147 transitions, 1176 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:31:52,869 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 781 flow [2024-06-21 21:31:52,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=781, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-21 21:31:52,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-21 21:31:52,870 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 781 flow [2024-06-21 21:31:52,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:52,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:52,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:52,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:31:52,870 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:52,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:52,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1665880977, now seen corresponding path program 4 times [2024-06-21 21:31:52,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:52,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897537821] [2024-06-21 21:31:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:52,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:55,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:55,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897537821] [2024-06-21 21:31:55,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897537821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:55,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:55,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:55,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066801161] [2024-06-21 21:31:55,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:55,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:55,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 781 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:55,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:55,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:55,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:56,465 INFO L124 PetriNetUnfolderBase]: 1703/2578 cut-off events. [2024-06-21 21:31:56,465 INFO L125 PetriNetUnfolderBase]: For 19237/19243 co-relation queries the response was YES. [2024-06-21 21:31:56,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12231 conditions, 2578 events. 1703/2578 cut-off events. For 19237/19243 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12193 event pairs, 544 based on Foata normal form. 4/2580 useless extension candidates. Maximal degree in co-relation 12196. Up to 2311 conditions per place. [2024-06-21 21:31:56,481 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 40 changer transitions 0/127 dead transitions. [2024-06-21 21:31:56,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 127 transitions, 1135 flow [2024-06-21 21:31:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:31:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:31:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:31:56,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 21:31:56,483 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 781 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:31:56,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 127 transitions, 1135 flow [2024-06-21 21:31:56,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 127 transitions, 1060 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 21:31:56,497 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 794 flow [2024-06-21 21:31:56,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=794, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-21 21:31:56,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 21:31:56,498 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 794 flow [2024-06-21 21:31:56,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:56,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:56,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:56,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:31:56,499 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:56,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:56,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1167416973, now seen corresponding path program 2 times [2024-06-21 21:31:56,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:56,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250557617] [2024-06-21 21:31:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:56,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:58,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:58,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250557617] [2024-06-21 21:31:58,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250557617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:58,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:58,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:31:58,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378803942] [2024-06-21 21:31:58,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:58,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:31:58,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:58,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:31:58,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:31:58,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:31:58,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 794 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:58,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:58,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:31:58,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:59,832 INFO L124 PetriNetUnfolderBase]: 1693/2566 cut-off events. [2024-06-21 21:31:59,832 INFO L125 PetriNetUnfolderBase]: For 20490/20496 co-relation queries the response was YES. [2024-06-21 21:31:59,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12383 conditions, 2566 events. 1693/2566 cut-off events. For 20490/20496 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11975 event pairs, 536 based on Foata normal form. 10/2575 useless extension candidates. Maximal degree in co-relation 12346. Up to 2351 conditions per place. [2024-06-21 21:31:59,847 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-21 21:31:59,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 148 transitions, 1381 flow [2024-06-21 21:31:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:31:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:31:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:31:59,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:31:59,849 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 794 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:31:59,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 148 transitions, 1381 flow [2024-06-21 21:31:59,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 148 transitions, 1262 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:31:59,866 INFO L231 Difference]: Finished difference. Result has 93 places, 119 transitions, 976 flow [2024-06-21 21:31:59,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=976, PETRI_PLACES=93, PETRI_TRANSITIONS=119} [2024-06-21 21:31:59,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 21:31:59,866 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 119 transitions, 976 flow [2024-06-21 21:31:59,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:59,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:59,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:59,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:31:59,867 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:31:59,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:59,867 INFO L85 PathProgramCache]: Analyzing trace with hash -548785299, now seen corresponding path program 3 times [2024-06-21 21:31:59,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:59,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679080727] [2024-06-21 21:31:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:59,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:02,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:02,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679080727] [2024-06-21 21:32:02,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679080727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:02,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:02,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:32:02,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540447527] [2024-06-21 21:32:02,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:02,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:32:02,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:32:02,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:32:02,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:02,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 119 transitions, 976 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:02,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:02,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:02,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:03,281 INFO L124 PetriNetUnfolderBase]: 1705/2584 cut-off events. [2024-06-21 21:32:03,281 INFO L125 PetriNetUnfolderBase]: For 23130/23144 co-relation queries the response was YES. [2024-06-21 21:32:03,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13019 conditions, 2584 events. 1705/2584 cut-off events. For 23130/23144 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12168 event pairs, 564 based on Foata normal form. 24/2607 useless extension candidates. Maximal degree in co-relation 12977. Up to 2358 conditions per place. [2024-06-21 21:32:03,295 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 111 selfloop transitions, 42 changer transitions 0/157 dead transitions. [2024-06-21 21:32:03,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 157 transitions, 1474 flow [2024-06-21 21:32:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:03,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:32:03,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:32:03,297 INFO L175 Difference]: Start difference. First operand has 93 places, 119 transitions, 976 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:32:03,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 157 transitions, 1474 flow [2024-06-21 21:32:03,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 157 transitions, 1430 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-21 21:32:03,316 INFO L231 Difference]: Finished difference. Result has 101 places, 126 transitions, 1121 flow [2024-06-21 21:32:03,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1121, PETRI_PLACES=101, PETRI_TRANSITIONS=126} [2024-06-21 21:32:03,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 21:32:03,317 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 126 transitions, 1121 flow [2024-06-21 21:32:03,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:03,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:03,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:03,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:32:03,317 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:03,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:03,318 INFO L85 PathProgramCache]: Analyzing trace with hash -548539221, now seen corresponding path program 1 times [2024-06-21 21:32:03,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:03,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822777462] [2024-06-21 21:32:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:03,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:06,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822777462] [2024-06-21 21:32:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822777462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:06,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:06,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:06,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223885463] [2024-06-21 21:32:06,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:06,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:06,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:06,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:06,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 126 transitions, 1121 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:06,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:06,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:06,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:07,650 INFO L124 PetriNetUnfolderBase]: 1697/2568 cut-off events. [2024-06-21 21:32:07,650 INFO L125 PetriNetUnfolderBase]: For 25792/25792 co-relation queries the response was YES. [2024-06-21 21:32:07,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13400 conditions, 2568 events. 1697/2568 cut-off events. For 25792/25792 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12008 event pairs, 539 based on Foata normal form. 4/2571 useless extension candidates. Maximal degree in co-relation 13354. Up to 2467 conditions per place. [2024-06-21 21:32:07,665 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 136 selfloop transitions, 13 changer transitions 0/153 dead transitions. [2024-06-21 21:32:07,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 153 transitions, 1505 flow [2024-06-21 21:32:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:32:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:32:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:32:07,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:32:07,667 INFO L175 Difference]: Start difference. First operand has 101 places, 126 transitions, 1121 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:32:07,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 153 transitions, 1505 flow [2024-06-21 21:32:07,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 1429 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 21:32:07,692 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1100 flow [2024-06-21 21:32:07,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1100, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-06-21 21:32:07,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 21:32:07,693 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1100 flow [2024-06-21 21:32:07,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:07,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:07,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:07,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:32:07,694 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:07,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1813896292, now seen corresponding path program 1 times [2024-06-21 21:32:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:07,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981076707] [2024-06-21 21:32:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:10,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:10,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981076707] [2024-06-21 21:32:10,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981076707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:10,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:10,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:10,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248545351] [2024-06-21 21:32:10,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:10,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:10,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:10,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:10,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:10,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1100 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:10,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:10,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:10,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:11,969 INFO L124 PetriNetUnfolderBase]: 1830/2761 cut-off events. [2024-06-21 21:32:11,969 INFO L125 PetriNetUnfolderBase]: For 30507/30515 co-relation queries the response was YES. [2024-06-21 21:32:11,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14602 conditions, 2761 events. 1830/2761 cut-off events. For 30507/30515 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13136 event pairs, 509 based on Foata normal form. 18/2778 useless extension candidates. Maximal degree in co-relation 14554. Up to 2453 conditions per place. [2024-06-21 21:32:11,988 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 139 selfloop transitions, 48 changer transitions 0/191 dead transitions. [2024-06-21 21:32:11,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 191 transitions, 1849 flow [2024-06-21 21:32:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 21:32:11,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 21:32:11,991 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1100 flow. Second operand 10 states and 177 transitions. [2024-06-21 21:32:11,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 191 transitions, 1849 flow [2024-06-21 21:32:12,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 191 transitions, 1810 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:12,023 INFO L231 Difference]: Finished difference. Result has 111 places, 143 transitions, 1355 flow [2024-06-21 21:32:12,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1355, PETRI_PLACES=111, PETRI_TRANSITIONS=143} [2024-06-21 21:32:12,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 21:32:12,024 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 143 transitions, 1355 flow [2024-06-21 21:32:12,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:12,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:12,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:12,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:32:12,025 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:12,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:12,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1028589348, now seen corresponding path program 2 times [2024-06-21 21:32:12,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:12,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319981697] [2024-06-21 21:32:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:12,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:14,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:14,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319981697] [2024-06-21 21:32:14,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319981697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:14,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:14,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:14,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161658851] [2024-06-21 21:32:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:14,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:14,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:14,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:14,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 143 transitions, 1355 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:14,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:14,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:14,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:16,451 INFO L124 PetriNetUnfolderBase]: 2158/3263 cut-off events. [2024-06-21 21:32:16,451 INFO L125 PetriNetUnfolderBase]: For 43750/43752 co-relation queries the response was YES. [2024-06-21 21:32:16,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18697 conditions, 3263 events. 2158/3263 cut-off events. For 43750/43752 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15980 event pairs, 585 based on Foata normal form. 12/3274 useless extension candidates. Maximal degree in co-relation 18646. Up to 2310 conditions per place. [2024-06-21 21:32:16,474 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 132 selfloop transitions, 91 changer transitions 0/227 dead transitions. [2024-06-21 21:32:16,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 227 transitions, 2464 flow [2024-06-21 21:32:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:32:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:32:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 21:32:16,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-21 21:32:16,476 INFO L175 Difference]: Start difference. First operand has 111 places, 143 transitions, 1355 flow. Second operand 11 states and 214 transitions. [2024-06-21 21:32:16,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 227 transitions, 2464 flow [2024-06-21 21:32:16,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 227 transitions, 2312 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:16,521 INFO L231 Difference]: Finished difference. Result has 118 places, 160 transitions, 1649 flow [2024-06-21 21:32:16,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1649, PETRI_PLACES=118, PETRI_TRANSITIONS=160} [2024-06-21 21:32:16,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 21:32:16,521 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 160 transitions, 1649 flow [2024-06-21 21:32:16,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:16,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:16,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:16,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:32:16,522 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:16,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:16,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1028583768, now seen corresponding path program 3 times [2024-06-21 21:32:16,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:16,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786843848] [2024-06-21 21:32:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:16,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:19,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786843848] [2024-06-21 21:32:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786843848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:19,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:19,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:19,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495646418] [2024-06-21 21:32:19,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:19,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:19,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:19,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:19,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:19,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:19,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 160 transitions, 1649 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:19,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:19,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:19,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:20,787 INFO L124 PetriNetUnfolderBase]: 2202/3325 cut-off events. [2024-06-21 21:32:20,787 INFO L125 PetriNetUnfolderBase]: For 51928/51930 co-relation queries the response was YES. [2024-06-21 21:32:20,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20335 conditions, 3325 events. 2202/3325 cut-off events. For 51928/51930 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16293 event pairs, 547 based on Foata normal form. 12/3336 useless extension candidates. Maximal degree in co-relation 20281. Up to 2347 conditions per place. [2024-06-21 21:32:20,810 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 118 selfloop transitions, 101 changer transitions 0/223 dead transitions. [2024-06-21 21:32:20,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 223 transitions, 2589 flow [2024-06-21 21:32:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 21:32:20,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 21:32:20,813 INFO L175 Difference]: Start difference. First operand has 118 places, 160 transitions, 1649 flow. Second operand 10 states and 191 transitions. [2024-06-21 21:32:20,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 223 transitions, 2589 flow [2024-06-21 21:32:20,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 223 transitions, 2432 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:20,866 INFO L231 Difference]: Finished difference. Result has 125 places, 169 transitions, 1911 flow [2024-06-21 21:32:20,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1911, PETRI_PLACES=125, PETRI_TRANSITIONS=169} [2024-06-21 21:32:20,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 21:32:20,867 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 169 transitions, 1911 flow [2024-06-21 21:32:20,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:20,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:20,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:20,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:32:20,867 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:20,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash 110061292, now seen corresponding path program 4 times [2024-06-21 21:32:20,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:20,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917665984] [2024-06-21 21:32:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:20,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:23,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:23,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917665984] [2024-06-21 21:32:23,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917665984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:23,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:23,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:23,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791698453] [2024-06-21 21:32:23,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:23,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:23,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:23,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:23,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:23,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 169 transitions, 1911 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:23,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:23,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:23,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:24,854 INFO L124 PetriNetUnfolderBase]: 2192/3321 cut-off events. [2024-06-21 21:32:24,854 INFO L125 PetriNetUnfolderBase]: For 54603/54613 co-relation queries the response was YES. [2024-06-21 21:32:24,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21009 conditions, 3321 events. 2192/3321 cut-off events. For 54603/54613 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16233 event pairs, 604 based on Foata normal form. 7/3327 useless extension candidates. Maximal degree in co-relation 20951. Up to 2821 conditions per place. [2024-06-21 21:32:24,876 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 55 changer transitions 0/229 dead transitions. [2024-06-21 21:32:24,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 229 transitions, 2879 flow [2024-06-21 21:32:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:32:24,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:32:24,877 INFO L175 Difference]: Start difference. First operand has 125 places, 169 transitions, 1911 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:32:24,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 229 transitions, 2879 flow [2024-06-21 21:32:24,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 229 transitions, 2624 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:24,934 INFO L231 Difference]: Finished difference. Result has 130 places, 196 transitions, 2243 flow [2024-06-21 21:32:24,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2243, PETRI_PLACES=130, PETRI_TRANSITIONS=196} [2024-06-21 21:32:24,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-21 21:32:24,935 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 196 transitions, 2243 flow [2024-06-21 21:32:24,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:24,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:24,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:24,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:32:24,935 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:24,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:24,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1822837286, now seen corresponding path program 5 times [2024-06-21 21:32:24,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:24,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849430863] [2024-06-21 21:32:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:24,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:27,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:27,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849430863] [2024-06-21 21:32:27,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849430863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:27,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:27,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:27,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188402458] [2024-06-21 21:32:27,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:27,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:27,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:27,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:27,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:27,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 196 transitions, 2243 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:27,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:27,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:27,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:28,884 INFO L124 PetriNetUnfolderBase]: 2288/3473 cut-off events. [2024-06-21 21:32:28,884 INFO L125 PetriNetUnfolderBase]: For 61251/61261 co-relation queries the response was YES. [2024-06-21 21:32:28,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22221 conditions, 3473 events. 2288/3473 cut-off events. For 61251/61261 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17202 event pairs, 641 based on Foata normal form. 13/3485 useless extension candidates. Maximal degree in co-relation 22159. Up to 2866 conditions per place. [2024-06-21 21:32:28,906 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 157 selfloop transitions, 87 changer transitions 0/248 dead transitions. [2024-06-21 21:32:28,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 248 transitions, 3196 flow [2024-06-21 21:32:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:32:28,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:32:28,908 INFO L175 Difference]: Start difference. First operand has 130 places, 196 transitions, 2243 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:32:28,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 248 transitions, 3196 flow [2024-06-21 21:32:28,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 248 transitions, 3094 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-21 21:32:28,969 INFO L231 Difference]: Finished difference. Result has 138 places, 208 transitions, 2576 flow [2024-06-21 21:32:28,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2576, PETRI_PLACES=138, PETRI_TRANSITIONS=208} [2024-06-21 21:32:28,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-21 21:32:28,970 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 208 transitions, 2576 flow [2024-06-21 21:32:28,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:28,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:28,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:28,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:32:28,970 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:28,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1822831706, now seen corresponding path program 6 times [2024-06-21 21:32:28,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:28,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124323657] [2024-06-21 21:32:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:28,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:31,567 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 21:32:31,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:31,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124323657] [2024-06-21 21:32:31,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124323657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:31,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:31,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:31,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384043795] [2024-06-21 21:32:31,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:31,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:31,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:31,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:31,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:31,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 208 transitions, 2576 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:31,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:31,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:31,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:33,032 INFO L124 PetriNetUnfolderBase]: 2268/3447 cut-off events. [2024-06-21 21:32:33,032 INFO L125 PetriNetUnfolderBase]: For 65673/65683 co-relation queries the response was YES. [2024-06-21 21:32:33,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22520 conditions, 3447 events. 2268/3447 cut-off events. For 65673/65683 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17075 event pairs, 654 based on Foata normal form. 13/3459 useless extension candidates. Maximal degree in co-relation 22454. Up to 2855 conditions per place. [2024-06-21 21:32:33,058 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 165 selfloop transitions, 87 changer transitions 0/256 dead transitions. [2024-06-21 21:32:33,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 256 transitions, 3303 flow [2024-06-21 21:32:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 21:32:33,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 21:32:33,060 INFO L175 Difference]: Start difference. First operand has 138 places, 208 transitions, 2576 flow. Second operand 10 states and 184 transitions. [2024-06-21 21:32:33,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 256 transitions, 3303 flow [2024-06-21 21:32:33,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 256 transitions, 3024 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:33,143 INFO L231 Difference]: Finished difference. Result has 143 places, 208 transitions, 2485 flow [2024-06-21 21:32:33,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2485, PETRI_PLACES=143, PETRI_TRANSITIONS=208} [2024-06-21 21:32:33,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 21:32:33,144 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 208 transitions, 2485 flow [2024-06-21 21:32:33,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:33,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:33,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:33,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:32:33,144 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:33,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1891700116, now seen corresponding path program 1 times [2024-06-21 21:32:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805076535] [2024-06-21 21:32:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:36,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805076535] [2024-06-21 21:32:36,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805076535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:36,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:36,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416572067] [2024-06-21 21:32:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:36,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:36,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:36,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 208 transitions, 2485 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:36,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:36,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:36,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:37,781 INFO L124 PetriNetUnfolderBase]: 2337/3558 cut-off events. [2024-06-21 21:32:37,781 INFO L125 PetriNetUnfolderBase]: For 69672/69680 co-relation queries the response was YES. [2024-06-21 21:32:37,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23407 conditions, 3558 events. 2337/3558 cut-off events. For 69672/69680 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17880 event pairs, 488 based on Foata normal form. 14/3571 useless extension candidates. Maximal degree in co-relation 23339. Up to 3141 conditions per place. [2024-06-21 21:32:37,806 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 51 changer transitions 0/258 dead transitions. [2024-06-21 21:32:37,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 258 transitions, 3351 flow [2024-06-21 21:32:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:32:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:32:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:32:37,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:32:37,807 INFO L175 Difference]: Start difference. First operand has 143 places, 208 transitions, 2485 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:32:37,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 258 transitions, 3351 flow [2024-06-21 21:32:37,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 258 transitions, 3158 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:32:37,891 INFO L231 Difference]: Finished difference. Result has 143 places, 212 transitions, 2509 flow [2024-06-21 21:32:37,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2509, PETRI_PLACES=143, PETRI_TRANSITIONS=212} [2024-06-21 21:32:37,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 21:32:37,892 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 212 transitions, 2509 flow [2024-06-21 21:32:37,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:37,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:37,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:37,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:32:37,892 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:37,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:37,892 INFO L85 PathProgramCache]: Analyzing trace with hash 178608064, now seen corresponding path program 2 times [2024-06-21 21:32:37,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:37,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586832841] [2024-06-21 21:32:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:37,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:41,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:41,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586832841] [2024-06-21 21:32:41,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586832841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:41,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:41,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:41,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501450659] [2024-06-21 21:32:41,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:41,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:41,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:41,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:41,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:41,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:41,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 212 transitions, 2509 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:41,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:41,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:41,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:42,543 INFO L124 PetriNetUnfolderBase]: 2324/3539 cut-off events. [2024-06-21 21:32:42,543 INFO L125 PetriNetUnfolderBase]: For 71907/71915 co-relation queries the response was YES. [2024-06-21 21:32:42,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23247 conditions, 3539 events. 2324/3539 cut-off events. For 71907/71915 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17724 event pairs, 635 based on Foata normal form. 14/3552 useless extension candidates. Maximal degree in co-relation 23179. Up to 3241 conditions per place. [2024-06-21 21:32:42,571 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 47 changer transitions 0/249 dead transitions. [2024-06-21 21:32:42,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 249 transitions, 3125 flow [2024-06-21 21:32:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:32:42,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:32:42,572 INFO L175 Difference]: Start difference. First operand has 143 places, 212 transitions, 2509 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:32:42,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 249 transitions, 3125 flow [2024-06-21 21:32:42,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 249 transitions, 3000 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 21:32:42,659 INFO L231 Difference]: Finished difference. Result has 146 places, 212 transitions, 2489 flow [2024-06-21 21:32:42,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2489, PETRI_PLACES=146, PETRI_TRANSITIONS=212} [2024-06-21 21:32:42,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 21:32:42,660 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 212 transitions, 2489 flow [2024-06-21 21:32:42,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:42,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:42,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:42,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:32:42,660 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:42,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:42,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1210183758, now seen corresponding path program 3 times [2024-06-21 21:32:42,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:42,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954300975] [2024-06-21 21:32:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:42,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:45,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954300975] [2024-06-21 21:32:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954300975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:45,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:45,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453941458] [2024-06-21 21:32:45,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:45,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:45,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 212 transitions, 2489 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:45,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:45,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:45,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:47,300 INFO L124 PetriNetUnfolderBase]: 2352/3581 cut-off events. [2024-06-21 21:32:47,301 INFO L125 PetriNetUnfolderBase]: For 77214/77216 co-relation queries the response was YES. [2024-06-21 21:32:47,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23699 conditions, 3581 events. 2352/3581 cut-off events. For 77214/77216 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17958 event pairs, 646 based on Foata normal form. 8/3588 useless extension candidates. Maximal degree in co-relation 23629. Up to 3207 conditions per place. [2024-06-21 21:32:47,328 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 182 selfloop transitions, 63 changer transitions 0/249 dead transitions. [2024-06-21 21:32:47,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 249 transitions, 3168 flow [2024-06-21 21:32:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:32:47,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:32:47,329 INFO L175 Difference]: Start difference. First operand has 146 places, 212 transitions, 2489 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:32:47,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 249 transitions, 3168 flow [2024-06-21 21:32:47,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 249 transitions, 3064 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:32:47,420 INFO L231 Difference]: Finished difference. Result has 147 places, 214 transitions, 2579 flow [2024-06-21 21:32:47,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2385, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2579, PETRI_PLACES=147, PETRI_TRANSITIONS=214} [2024-06-21 21:32:47,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-21 21:32:47,421 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 214 transitions, 2579 flow [2024-06-21 21:32:47,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:47,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:47,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:47,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:32:47,422 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:47,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:47,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1946050150, now seen corresponding path program 1 times [2024-06-21 21:32:47,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:47,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199699906] [2024-06-21 21:32:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:47,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:51,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:51,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199699906] [2024-06-21 21:32:51,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199699906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:51,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:51,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:32:51,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750619014] [2024-06-21 21:32:51,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:51,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:32:51,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:51,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:32:51,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:32:51,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:51,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 214 transitions, 2579 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:51,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:51,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:51,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:52,949 INFO L124 PetriNetUnfolderBase]: 2440/3690 cut-off events. [2024-06-21 21:32:52,949 INFO L125 PetriNetUnfolderBase]: For 88950/88960 co-relation queries the response was YES. [2024-06-21 21:32:52,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24665 conditions, 3690 events. 2440/3690 cut-off events. For 88950/88960 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18481 event pairs, 608 based on Foata normal form. 28/3717 useless extension candidates. Maximal degree in co-relation 24594. Up to 3223 conditions per place. [2024-06-21 21:32:52,977 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 209 selfloop transitions, 57 changer transitions 0/270 dead transitions. [2024-06-21 21:32:52,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 270 transitions, 3435 flow [2024-06-21 21:32:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:32:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:32:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 21:32:52,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:32:52,979 INFO L175 Difference]: Start difference. First operand has 147 places, 214 transitions, 2579 flow. Second operand 10 states and 186 transitions. [2024-06-21 21:32:52,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 270 transitions, 3435 flow [2024-06-21 21:32:53,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 270 transitions, 3275 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:32:53,074 INFO L231 Difference]: Finished difference. Result has 151 places, 217 transitions, 2617 flow [2024-06-21 21:32:53,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2617, PETRI_PLACES=151, PETRI_TRANSITIONS=217} [2024-06-21 21:32:53,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 21:32:53,074 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 217 transitions, 2617 flow [2024-06-21 21:32:53,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:32:53,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:53,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:53,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:32:53,075 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:53,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1111144976, now seen corresponding path program 4 times [2024-06-21 21:32:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814775014] [2024-06-21 21:32:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:53,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:32:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:32:56,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:32:56,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814775014] [2024-06-21 21:32:56,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814775014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:32:56,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:32:56,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:32:56,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100093961] [2024-06-21 21:32:56,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:32:56,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:32:56,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:32:56,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:32:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:32:56,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:32:56,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 217 transitions, 2617 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:56,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:32:56,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:32:56,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:32:57,544 INFO L124 PetriNetUnfolderBase]: 2427/3700 cut-off events. [2024-06-21 21:32:57,544 INFO L125 PetriNetUnfolderBase]: For 87436/87446 co-relation queries the response was YES. [2024-06-21 21:32:57,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24854 conditions, 3700 events. 2427/3700 cut-off events. For 87436/87446 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18705 event pairs, 667 based on Foata normal form. 9/3708 useless extension candidates. Maximal degree in co-relation 24782. Up to 3328 conditions per place. [2024-06-21 21:32:57,573 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 63 changer transitions 0/251 dead transitions. [2024-06-21 21:32:57,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 251 transitions, 3300 flow [2024-06-21 21:32:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:32:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:32:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:32:57,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:32:57,575 INFO L175 Difference]: Start difference. First operand has 151 places, 217 transitions, 2617 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:32:57,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 251 transitions, 3300 flow [2024-06-21 21:32:57,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 251 transitions, 3134 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 21:32:57,680 INFO L231 Difference]: Finished difference. Result has 151 places, 219 transitions, 2651 flow [2024-06-21 21:32:57,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2651, PETRI_PLACES=151, PETRI_TRANSITIONS=219} [2024-06-21 21:32:57,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 21:32:57,681 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 219 transitions, 2651 flow [2024-06-21 21:32:57,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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 21:32:57,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:32:57,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:32:57,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:32:57,681 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:32:57,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:32:57,682 INFO L85 PathProgramCache]: Analyzing trace with hash 673389134, now seen corresponding path program 2 times [2024-06-21 21:32:57,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:32:57,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575039601] [2024-06-21 21:32:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:32:57,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:32:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:01,082 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 21:33:01,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:01,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575039601] [2024-06-21 21:33:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575039601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:01,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:01,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:01,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452407917] [2024-06-21 21:33:01,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:01,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:01,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:01,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:01,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:01,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 219 transitions, 2651 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:01,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:01,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:01,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:02,664 INFO L124 PetriNetUnfolderBase]: 2515/3829 cut-off events. [2024-06-21 21:33:02,664 INFO L125 PetriNetUnfolderBase]: For 98933/98947 co-relation queries the response was YES. [2024-06-21 21:33:02,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25581 conditions, 3829 events. 2515/3829 cut-off events. For 98933/98947 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19427 event pairs, 629 based on Foata normal form. 32/3860 useless extension candidates. Maximal degree in co-relation 25508. Up to 3444 conditions per place. [2024-06-21 21:33:02,691 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 214 selfloop transitions, 47 changer transitions 0/265 dead transitions. [2024-06-21 21:33:02,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 265 transitions, 3444 flow [2024-06-21 21:33:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:33:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:33:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 21:33:02,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 21:33:02,692 INFO L175 Difference]: Start difference. First operand has 151 places, 219 transitions, 2651 flow. Second operand 10 states and 169 transitions. [2024-06-21 21:33:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 265 transitions, 3444 flow [2024-06-21 21:33:02,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 265 transitions, 3280 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:02,794 INFO L231 Difference]: Finished difference. Result has 155 places, 222 transitions, 2673 flow [2024-06-21 21:33:02,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2673, PETRI_PLACES=155, PETRI_TRANSITIONS=222} [2024-06-21 21:33:02,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 21:33:02,794 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 222 transitions, 2673 flow [2024-06-21 21:33:02,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:02,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:02,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:02,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:33:02,795 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:02,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:02,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1134523916, now seen corresponding path program 3 times [2024-06-21 21:33:02,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:02,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185162674] [2024-06-21 21:33:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:02,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:05,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:05,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185162674] [2024-06-21 21:33:05,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185162674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:05,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:05,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:33:05,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176377763] [2024-06-21 21:33:05,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:05,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:33:05,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:05,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:33:05,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:33:06,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:06,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 222 transitions, 2673 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:06,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:06,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:06,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:07,450 INFO L124 PetriNetUnfolderBase]: 2535/3878 cut-off events. [2024-06-21 21:33:07,450 INFO L125 PetriNetUnfolderBase]: For 99456/99470 co-relation queries the response was YES. [2024-06-21 21:33:07,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26122 conditions, 3878 events. 2535/3878 cut-off events. For 99456/99470 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19733 event pairs, 619 based on Foata normal form. 18/3895 useless extension candidates. Maximal degree in co-relation 26048. Up to 3571 conditions per place. [2024-06-21 21:33:07,484 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 31 changer transitions 0/256 dead transitions. [2024-06-21 21:33:07,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 256 transitions, 3307 flow [2024-06-21 21:33:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:33:07,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:33:07,485 INFO L175 Difference]: Start difference. First operand has 155 places, 222 transitions, 2673 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:33:07,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 256 transitions, 3307 flow [2024-06-21 21:33:07,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 256 transitions, 3168 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:07,612 INFO L231 Difference]: Finished difference. Result has 156 places, 224 transitions, 2647 flow [2024-06-21 21:33:07,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2647, PETRI_PLACES=156, PETRI_TRANSITIONS=224} [2024-06-21 21:33:07,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-21 21:33:07,613 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 224 transitions, 2647 flow [2024-06-21 21:33:07,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:07,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:07,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:33:07,613 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:07,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash 909861164, now seen corresponding path program 4 times [2024-06-21 21:33:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:07,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951357258] [2024-06-21 21:33:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:07,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:10,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:10,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951357258] [2024-06-21 21:33:10,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951357258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:10,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:10,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:10,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369653237] [2024-06-21 21:33:10,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:10,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:10,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:10,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:10,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 224 transitions, 2647 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:10,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:10,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:10,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:12,206 INFO L124 PetriNetUnfolderBase]: 2527/3870 cut-off events. [2024-06-21 21:33:12,206 INFO L125 PetriNetUnfolderBase]: For 103140/103154 co-relation queries the response was YES. [2024-06-21 21:33:12,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26034 conditions, 3870 events. 2527/3870 cut-off events. For 103140/103154 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19698 event pairs, 587 based on Foata normal form. 18/3887 useless extension candidates. Maximal degree in co-relation 25959. Up to 3465 conditions per place. [2024-06-21 21:33:12,231 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 38 changer transitions 0/260 dead transitions. [2024-06-21 21:33:12,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 260 transitions, 3309 flow [2024-06-21 21:33:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:33:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:33:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:33:12,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:33:12,233 INFO L175 Difference]: Start difference. First operand has 156 places, 224 transitions, 2647 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:33:12,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 260 transitions, 3309 flow [2024-06-21 21:33:12,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 260 transitions, 3214 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:33:12,337 INFO L231 Difference]: Finished difference. Result has 159 places, 228 transitions, 2715 flow [2024-06-21 21:33:12,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2715, PETRI_PLACES=159, PETRI_TRANSITIONS=228} [2024-06-21 21:33:12,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 21:33:12,338 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 228 transitions, 2715 flow [2024-06-21 21:33:12,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:12,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:12,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:12,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:33:12,339 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:12,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:12,339 INFO L85 PathProgramCache]: Analyzing trace with hash -941946020, now seen corresponding path program 1 times [2024-06-21 21:33:12,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:12,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742866701] [2024-06-21 21:33:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:12,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:14,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:14,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742866701] [2024-06-21 21:33:14,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742866701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:14,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:14,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:33:14,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210553036] [2024-06-21 21:33:14,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:14,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:33:14,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:14,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:33:14,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:33:14,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:33:14,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 228 transitions, 2715 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:14,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:14,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:33:14,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:15,402 INFO L124 PetriNetUnfolderBase]: 2278/3546 cut-off events. [2024-06-21 21:33:15,402 INFO L125 PetriNetUnfolderBase]: For 104594/104636 co-relation queries the response was YES. [2024-06-21 21:33:15,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24761 conditions, 3546 events. 2278/3546 cut-off events. For 104594/104636 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18614 event pairs, 614 based on Foata normal form. 16/3517 useless extension candidates. Maximal degree in co-relation 24684. Up to 3239 conditions per place. [2024-06-21 21:33:15,432 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 203 selfloop transitions, 10 changer transitions 0/241 dead transitions. [2024-06-21 21:33:15,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 241 transitions, 3195 flow [2024-06-21 21:33:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:33:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:33:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-21 21:33:15,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-21 21:33:15,433 INFO L175 Difference]: Start difference. First operand has 159 places, 228 transitions, 2715 flow. Second operand 5 states and 86 transitions. [2024-06-21 21:33:15,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 241 transitions, 3195 flow [2024-06-21 21:33:15,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 241 transitions, 3086 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:33:15,555 INFO L231 Difference]: Finished difference. Result has 159 places, 231 transitions, 2666 flow [2024-06-21 21:33:15,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2666, PETRI_PLACES=159, PETRI_TRANSITIONS=231} [2024-06-21 21:33:15,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 21:33:15,556 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 231 transitions, 2666 flow [2024-06-21 21:33:15,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:15,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:15,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:15,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:33:15,556 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:15,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash -774185243, now seen corresponding path program 1 times [2024-06-21 21:33:15,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:15,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982485846] [2024-06-21 21:33:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:15,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:20,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:20,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982485846] [2024-06-21 21:33:20,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982485846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:20,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:20,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:20,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721922806] [2024-06-21 21:33:20,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:20,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:20,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:20,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:20,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:20,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 231 transitions, 2666 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:20,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:20,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:20,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:22,468 INFO L124 PetriNetUnfolderBase]: 3559/5521 cut-off events. [2024-06-21 21:33:22,468 INFO L125 PetriNetUnfolderBase]: For 214219/214227 co-relation queries the response was YES. [2024-06-21 21:33:22,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38039 conditions, 5521 events. 3559/5521 cut-off events. For 214219/214227 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 30947 event pairs, 772 based on Foata normal form. 72/5592 useless extension candidates. Maximal degree in co-relation 37961. Up to 3288 conditions per place. [2024-06-21 21:33:22,517 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 261 selfloop transitions, 62 changer transitions 0/327 dead transitions. [2024-06-21 21:33:22,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 327 transitions, 4271 flow [2024-06-21 21:33:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:33:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:33:22,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-21 21:33:22,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 21:33:22,518 INFO L175 Difference]: Start difference. First operand has 159 places, 231 transitions, 2666 flow. Second operand 12 states and 230 transitions. [2024-06-21 21:33:22,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 327 transitions, 4271 flow [2024-06-21 21:33:22,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 327 transitions, 4233 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:33:22,718 INFO L231 Difference]: Finished difference. Result has 170 places, 239 transitions, 2996 flow [2024-06-21 21:33:22,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2996, PETRI_PLACES=170, PETRI_TRANSITIONS=239} [2024-06-21 21:33:22,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 21:33:22,719 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 239 transitions, 2996 flow [2024-06-21 21:33:22,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:22,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:22,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:33:22,719 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:22,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 602423099, now seen corresponding path program 2 times [2024-06-21 21:33:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:22,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522714184] [2024-06-21 21:33:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:26,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522714184] [2024-06-21 21:33:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522714184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:26,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:26,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:26,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740597720] [2024-06-21 21:33:26,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:26,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:26,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:26,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:26,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:26,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:26,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 239 transitions, 2996 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:26,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:26,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:26,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:28,664 INFO L124 PetriNetUnfolderBase]: 3830/5982 cut-off events. [2024-06-21 21:33:28,664 INFO L125 PetriNetUnfolderBase]: For 237111/237119 co-relation queries the response was YES. [2024-06-21 21:33:28,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40979 conditions, 5982 events. 3830/5982 cut-off events. For 237111/237119 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 34399 event pairs, 1333 based on Foata normal form. 82/6063 useless extension candidates. Maximal degree in co-relation 40898. Up to 5067 conditions per place. [2024-06-21 21:33:28,712 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 235 selfloop transitions, 62 changer transitions 0/301 dead transitions. [2024-06-21 21:33:28,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 301 transitions, 4047 flow [2024-06-21 21:33:28,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:33:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:33:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-21 21:33:28,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-21 21:33:28,714 INFO L175 Difference]: Start difference. First operand has 170 places, 239 transitions, 2996 flow. Second operand 11 states and 199 transitions. [2024-06-21 21:33:28,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 301 transitions, 4047 flow [2024-06-21 21:33:28,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 301 transitions, 3866 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:28,998 INFO L231 Difference]: Finished difference. Result has 174 places, 241 transitions, 3033 flow [2024-06-21 21:33:28,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3033, PETRI_PLACES=174, PETRI_TRANSITIONS=241} [2024-06-21 21:33:28,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 21:33:28,999 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 241 transitions, 3033 flow [2024-06-21 21:33:28,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:28,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:28,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:28,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:33:29,000 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:29,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash 88945343, now seen corresponding path program 3 times [2024-06-21 21:33:29,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:29,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553592150] [2024-06-21 21:33:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:32,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:32,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553592150] [2024-06-21 21:33:32,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553592150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:32,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:32,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:32,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386300483] [2024-06-21 21:33:32,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:32,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:32,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:32,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:32,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:32,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:32,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 241 transitions, 3033 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:32,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:32,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:32,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:34,636 INFO L124 PetriNetUnfolderBase]: 3950/6198 cut-off events. [2024-06-21 21:33:34,636 INFO L125 PetriNetUnfolderBase]: For 230379/230387 co-relation queries the response was YES. [2024-06-21 21:33:34,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40484 conditions, 6198 events. 3950/6198 cut-off events. For 230379/230387 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 36195 event pairs, 1159 based on Foata normal form. 72/6269 useless extension candidates. Maximal degree in co-relation 40401. Up to 4291 conditions per place. [2024-06-21 21:33:34,687 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 250 selfloop transitions, 60 changer transitions 0/314 dead transitions. [2024-06-21 21:33:34,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 314 transitions, 4299 flow [2024-06-21 21:33:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:33:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:33:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 21:33:34,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 21:33:34,689 INFO L175 Difference]: Start difference. First operand has 174 places, 241 transitions, 3033 flow. Second operand 11 states and 204 transitions. [2024-06-21 21:33:34,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 314 transitions, 4299 flow [2024-06-21 21:33:34,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 314 transitions, 4124 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 21:33:34,994 INFO L231 Difference]: Finished difference. Result has 177 places, 246 transitions, 3154 flow [2024-06-21 21:33:34,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2858, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3154, PETRI_PLACES=177, PETRI_TRANSITIONS=246} [2024-06-21 21:33:34,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-21 21:33:34,994 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 246 transitions, 3154 flow [2024-06-21 21:33:34,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:34,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:34,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:34,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:33:34,994 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:34,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -626485433, now seen corresponding path program 4 times [2024-06-21 21:33:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:34,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826789352] [2024-06-21 21:33:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:34,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:38,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:38,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826789352] [2024-06-21 21:33:38,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826789352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:38,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:38,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:38,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375530020] [2024-06-21 21:33:38,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:38,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:38,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:38,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:38,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:38,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:38,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 246 transitions, 3154 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:38,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:38,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:38,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:40,760 INFO L124 PetriNetUnfolderBase]: 4262/6732 cut-off events. [2024-06-21 21:33:40,760 INFO L125 PetriNetUnfolderBase]: For 254721/254723 co-relation queries the response was YES. [2024-06-21 21:33:40,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43062 conditions, 6732 events. 4262/6732 cut-off events. For 254721/254723 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 40331 event pairs, 1490 based on Foata normal form. 76/6807 useless extension candidates. Maximal degree in co-relation 42977. Up to 5134 conditions per place. [2024-06-21 21:33:40,813 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 173 selfloop transitions, 134 changer transitions 0/311 dead transitions. [2024-06-21 21:33:40,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 311 transitions, 4251 flow [2024-06-21 21:33:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:33:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:33:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 21:33:40,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-21 21:33:40,814 INFO L175 Difference]: Start difference. First operand has 177 places, 246 transitions, 3154 flow. Second operand 11 states and 212 transitions. [2024-06-21 21:33:40,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 311 transitions, 4251 flow [2024-06-21 21:33:41,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 311 transitions, 4098 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 21:33:41,159 INFO L231 Difference]: Finished difference. Result has 181 places, 248 transitions, 3366 flow [2024-06-21 21:33:41,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3366, PETRI_PLACES=181, PETRI_TRANSITIONS=248} [2024-06-21 21:33:41,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 21:33:41,160 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 248 transitions, 3366 flow [2024-06-21 21:33:41,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:41,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:41,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:41,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:33:41,160 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:41,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash -631847813, now seen corresponding path program 5 times [2024-06-21 21:33:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:41,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147059780] [2024-06-21 21:33:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:41,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:44,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:44,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147059780] [2024-06-21 21:33:44,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147059780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:44,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:44,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:44,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61402095] [2024-06-21 21:33:44,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:44,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:44,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:44,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:44,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:44,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:44,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 248 transitions, 3366 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:44,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:44,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:44,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:46,780 INFO L124 PetriNetUnfolderBase]: 4574/7256 cut-off events. [2024-06-21 21:33:46,780 INFO L125 PetriNetUnfolderBase]: For 275315/275317 co-relation queries the response was YES. [2024-06-21 21:33:46,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46131 conditions, 7256 events. 4574/7256 cut-off events. For 275315/275317 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 44496 event pairs, 1686 based on Foata normal form. 76/7331 useless extension candidates. Maximal degree in co-relation 46044. Up to 5658 conditions per place. [2024-06-21 21:33:46,837 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 188 selfloop transitions, 130 changer transitions 0/322 dead transitions. [2024-06-21 21:33:46,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 322 transitions, 4521 flow [2024-06-21 21:33:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:33:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:33:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-21 21:33:46,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:33:46,838 INFO L175 Difference]: Start difference. First operand has 181 places, 248 transitions, 3366 flow. Second operand 12 states and 234 transitions. [2024-06-21 21:33:46,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 322 transitions, 4521 flow [2024-06-21 21:33:47,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 322 transitions, 4184 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-21 21:33:47,178 INFO L231 Difference]: Finished difference. Result has 184 places, 250 transitions, 3390 flow [2024-06-21 21:33:47,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3390, PETRI_PLACES=184, PETRI_TRANSITIONS=250} [2024-06-21 21:33:47,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 21:33:47,179 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 250 transitions, 3390 flow [2024-06-21 21:33:47,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:47,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:47,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:47,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:33:47,179 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:47,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:47,179 INFO L85 PathProgramCache]: Analyzing trace with hash -631995683, now seen corresponding path program 6 times [2024-06-21 21:33:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:47,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453949624] [2024-06-21 21:33:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:50,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:50,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453949624] [2024-06-21 21:33:50,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453949624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:50,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:50,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:33:50,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009101589] [2024-06-21 21:33:50,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:50,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:33:50,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:33:50,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:33:50,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:50,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 250 transitions, 3390 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:50,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:50,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:50,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:53,011 INFO L124 PetriNetUnfolderBase]: 5135/8167 cut-off events. [2024-06-21 21:33:53,011 INFO L125 PetriNetUnfolderBase]: For 317506/317508 co-relation queries the response was YES. [2024-06-21 21:33:53,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51758 conditions, 8167 events. 5135/8167 cut-off events. For 317506/317508 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 51547 event pairs, 1707 based on Foata normal form. 66/8232 useless extension candidates. Maximal degree in co-relation 51670. Up to 5033 conditions per place. [2024-06-21 21:33:53,081 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 198 selfloop transitions, 133 changer transitions 0/335 dead transitions. [2024-06-21 21:33:53,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 335 transitions, 4783 flow [2024-06-21 21:33:53,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:33:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:33:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-21 21:33:53,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742063492063492 [2024-06-21 21:33:53,083 INFO L175 Difference]: Start difference. First operand has 184 places, 250 transitions, 3390 flow. Second operand 12 states and 239 transitions. [2024-06-21 21:33:53,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 335 transitions, 4783 flow [2024-06-21 21:33:53,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 335 transitions, 4458 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-21 21:33:53,495 INFO L231 Difference]: Finished difference. Result has 187 places, 255 transitions, 3536 flow [2024-06-21 21:33:53,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3536, PETRI_PLACES=187, PETRI_TRANSITIONS=255} [2024-06-21 21:33:53,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 21:33:53,496 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 255 transitions, 3536 flow [2024-06-21 21:33:53,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:33:53,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:33:53,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:33:53,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:33:53,496 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:33:53,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:33:53,497 INFO L85 PathProgramCache]: Analyzing trace with hash -626270231, now seen corresponding path program 1 times [2024-06-21 21:33:53,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:33:53,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391038725] [2024-06-21 21:33:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:33:53,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:33:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:33:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:33:57,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:33:57,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391038725] [2024-06-21 21:33:57,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391038725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:33:57,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:33:57,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:33:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669613516] [2024-06-21 21:33:57,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:33:57,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:33:57,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:33:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:33:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:33:57,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:33:57,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 255 transitions, 3536 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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 21:33:57,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:33:57,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:33:57,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:33:59,824 INFO L124 PetriNetUnfolderBase]: 5638/9028 cut-off events. [2024-06-21 21:33:59,824 INFO L125 PetriNetUnfolderBase]: For 370577/370579 co-relation queries the response was YES. [2024-06-21 21:33:59,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57746 conditions, 9028 events. 5638/9028 cut-off events. For 370577/370579 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 58824 event pairs, 1933 based on Foata normal form. 56/9083 useless extension candidates. Maximal degree in co-relation 57656. Up to 5374 conditions per place. [2024-06-21 21:33:59,897 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 181 selfloop transitions, 143 changer transitions 0/328 dead transitions. [2024-06-21 21:33:59,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 328 transitions, 4865 flow [2024-06-21 21:33:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:33:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:33:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 21:33:59,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-21 21:33:59,899 INFO L175 Difference]: Start difference. First operand has 187 places, 255 transitions, 3536 flow. Second operand 11 states and 217 transitions. [2024-06-21 21:33:59,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 328 transitions, 4865 flow [2024-06-21 21:34:00,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 328 transitions, 4542 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-21 21:34:00,332 INFO L231 Difference]: Finished difference. Result has 189 places, 258 transitions, 3659 flow [2024-06-21 21:34:00,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3659, PETRI_PLACES=189, PETRI_TRANSITIONS=258} [2024-06-21 21:34:00,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 21:34:00,332 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 258 transitions, 3659 flow [2024-06-21 21:34:00,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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 21:34:00,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:00,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:00,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:34:00,333 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:00,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:00,333 INFO L85 PathProgramCache]: Analyzing trace with hash -80244311, now seen corresponding path program 7 times [2024-06-21 21:34:00,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:00,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022591933] [2024-06-21 21:34:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:00,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:03,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:03,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022591933] [2024-06-21 21:34:03,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022591933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:03,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:03,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:03,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566588504] [2024-06-21 21:34:03,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:03,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:03,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:03,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:03,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:03,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 258 transitions, 3659 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:03,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:03,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:03,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:06,486 INFO L124 PetriNetUnfolderBase]: 5950/9550 cut-off events. [2024-06-21 21:34:06,486 INFO L125 PetriNetUnfolderBase]: For 407542/407552 co-relation queries the response was YES. [2024-06-21 21:34:06,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60576 conditions, 9550 events. 5950/9550 cut-off events. For 407542/407552 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 63428 event pairs, 2603 based on Foata normal form. 77/9626 useless extension candidates. Maximal degree in co-relation 60485. Up to 8371 conditions per place. [2024-06-21 21:34:06,575 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 218 selfloop transitions, 89 changer transitions 0/311 dead transitions. [2024-06-21 21:34:06,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 311 transitions, 4616 flow [2024-06-21 21:34:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:34:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:34:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:34:06,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:34:06,576 INFO L175 Difference]: Start difference. First operand has 189 places, 258 transitions, 3659 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:34:06,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 311 transitions, 4616 flow [2024-06-21 21:34:07,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 311 transitions, 4241 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-21 21:34:07,367 INFO L231 Difference]: Finished difference. Result has 190 places, 260 transitions, 3573 flow [2024-06-21 21:34:07,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3573, PETRI_PLACES=190, PETRI_TRANSITIONS=260} [2024-06-21 21:34:07,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-21 21:34:07,368 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 260 transitions, 3573 flow [2024-06-21 21:34:07,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:07,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:07,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:34:07,368 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:07,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash 553788457, now seen corresponding path program 8 times [2024-06-21 21:34:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:07,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053880907] [2024-06-21 21:34:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:10,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053880907] [2024-06-21 21:34:10,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053880907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:10,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:10,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:10,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184322496] [2024-06-21 21:34:10,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:10,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:10,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:10,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:10,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:10,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 260 transitions, 3573 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:10,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:10,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:10,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:13,454 INFO L124 PetriNetUnfolderBase]: 6038/9710 cut-off events. [2024-06-21 21:34:13,455 INFO L125 PetriNetUnfolderBase]: For 379922/379932 co-relation queries the response was YES. [2024-06-21 21:34:13,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61011 conditions, 9710 events. 6038/9710 cut-off events. For 379922/379932 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 64671 event pairs, 2620 based on Foata normal form. 23/9732 useless extension candidates. Maximal degree in co-relation 60920. Up to 8971 conditions per place. [2024-06-21 21:34:13,547 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 59 changer transitions 0/302 dead transitions. [2024-06-21 21:34:13,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 302 transitions, 4341 flow [2024-06-21 21:34:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:34:13,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:34:13,549 INFO L175 Difference]: Start difference. First operand has 190 places, 260 transitions, 3573 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:34:13,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 302 transitions, 4341 flow [2024-06-21 21:34:14,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 302 transitions, 4092 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 21:34:14,150 INFO L231 Difference]: Finished difference. Result has 191 places, 261 transitions, 3493 flow [2024-06-21 21:34:14,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3493, PETRI_PLACES=191, PETRI_TRANSITIONS=261} [2024-06-21 21:34:14,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 21:34:14,151 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 261 transitions, 3493 flow [2024-06-21 21:34:14,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:14,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:14,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:14,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:34:14,151 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:14,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:14,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2073425019, now seen corresponding path program 9 times [2024-06-21 21:34:14,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:14,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310980349] [2024-06-21 21:34:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:14,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:17,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:17,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310980349] [2024-06-21 21:34:17,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310980349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:17,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:17,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:17,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327451040] [2024-06-21 21:34:17,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:17,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:17,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:17,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:17,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 261 transitions, 3493 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:17,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:17,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:17,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:20,141 INFO L124 PetriNetUnfolderBase]: 6350/10234 cut-off events. [2024-06-21 21:34:20,141 INFO L125 PetriNetUnfolderBase]: For 439756/439766 co-relation queries the response was YES. [2024-06-21 21:34:20,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63296 conditions, 10234 events. 6350/10234 cut-off events. For 439756/439766 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 69160 event pairs, 2784 based on Foata normal form. 77/10310 useless extension candidates. Maximal degree in co-relation 63204. Up to 9043 conditions per place. [2024-06-21 21:34:20,237 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 231 selfloop transitions, 89 changer transitions 0/324 dead transitions. [2024-06-21 21:34:20,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 324 transitions, 4592 flow [2024-06-21 21:34:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:34:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:34:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 21:34:20,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-21 21:34:20,238 INFO L175 Difference]: Start difference. First operand has 191 places, 261 transitions, 3493 flow. Second operand 11 states and 206 transitions. [2024-06-21 21:34:20,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 324 transitions, 4592 flow [2024-06-21 21:34:20,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 324 transitions, 4435 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 21:34:20,778 INFO L231 Difference]: Finished difference. Result has 195 places, 263 transitions, 3631 flow [2024-06-21 21:34:20,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3631, PETRI_PLACES=195, PETRI_TRANSITIONS=263} [2024-06-21 21:34:20,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 21:34:20,779 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 263 transitions, 3631 flow [2024-06-21 21:34:20,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:20,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:20,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:34:20,779 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:20,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2073277149, now seen corresponding path program 10 times [2024-06-21 21:34:20,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:20,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311179579] [2024-06-21 21:34:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:23,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311179579] [2024-06-21 21:34:23,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311179579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:23,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:23,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:23,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951053318] [2024-06-21 21:34:23,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:23,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:23,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 263 transitions, 3631 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:23,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:23,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:23,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:26,688 INFO L124 PetriNetUnfolderBase]: 6855/11057 cut-off events. [2024-06-21 21:34:26,689 INFO L125 PetriNetUnfolderBase]: For 493893/493903 co-relation queries the response was YES. [2024-06-21 21:34:26,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68993 conditions, 11057 events. 6855/11057 cut-off events. For 493893/493903 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 76022 event pairs, 2809 based on Foata normal form. 67/11123 useless extension candidates. Maximal degree in co-relation 68900. Up to 8330 conditions per place. [2024-06-21 21:34:26,795 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 241 selfloop transitions, 92 changer transitions 0/337 dead transitions. [2024-06-21 21:34:26,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 337 transitions, 4984 flow [2024-06-21 21:34:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:34:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:34:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 21:34:26,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-06-21 21:34:26,796 INFO L175 Difference]: Start difference. First operand has 195 places, 263 transitions, 3631 flow. Second operand 11 states and 211 transitions. [2024-06-21 21:34:26,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 337 transitions, 4984 flow [2024-06-21 21:34:27,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 337 transitions, 4729 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-21 21:34:27,516 INFO L231 Difference]: Finished difference. Result has 198 places, 268 transitions, 3787 flow [2024-06-21 21:34:27,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3787, PETRI_PLACES=198, PETRI_TRANSITIONS=268} [2024-06-21 21:34:27,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 21:34:27,517 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 268 transitions, 3787 flow [2024-06-21 21:34:27,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:27,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:27,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:27,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:34:27,517 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:27,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:27,517 INFO L85 PathProgramCache]: Analyzing trace with hash -599772185, now seen corresponding path program 2 times [2024-06-21 21:34:27,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:27,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884259422] [2024-06-21 21:34:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:31,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884259422] [2024-06-21 21:34:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884259422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:31,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:31,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:34:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914586040] [2024-06-21 21:34:31,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:31,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:34:31,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:31,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:34:31,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:34:31,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:31,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 268 transitions, 3787 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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 21:34:31,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:31,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:31,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:34,056 INFO L124 PetriNetUnfolderBase]: 7067/11477 cut-off events. [2024-06-21 21:34:34,056 INFO L125 PetriNetUnfolderBase]: For 504840/504850 co-relation queries the response was YES. [2024-06-21 21:34:34,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70877 conditions, 11477 events. 7067/11477 cut-off events. For 504840/504850 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 80192 event pairs, 3044 based on Foata normal form. 57/11533 useless extension candidates. Maximal degree in co-relation 70782. Up to 9206 conditions per place. [2024-06-21 21:34:34,174 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 228 selfloop transitions, 95 changer transitions 0/327 dead transitions. [2024-06-21 21:34:34,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 327 transitions, 4834 flow [2024-06-21 21:34:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:34:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:34:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 21:34:34,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:34:34,177 INFO L175 Difference]: Start difference. First operand has 198 places, 268 transitions, 3787 flow. Second operand 10 states and 189 transitions. [2024-06-21 21:34:34,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 327 transitions, 4834 flow [2024-06-21 21:34:34,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 327 transitions, 4599 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 21:34:34,921 INFO L231 Difference]: Finished difference. Result has 201 places, 270 transitions, 3860 flow [2024-06-21 21:34:34,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3860, PETRI_PLACES=201, PETRI_TRANSITIONS=270} [2024-06-21 21:34:34,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 21:34:34,922 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 270 transitions, 3860 flow [2024-06-21 21:34:34,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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 21:34:34,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:34,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:34,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:34:34,922 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:34,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:34,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1868270617, now seen corresponding path program 3 times [2024-06-21 21:34:34,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:34,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705527325] [2024-06-21 21:34:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:34,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:38,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:38,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705527325] [2024-06-21 21:34:38,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705527325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:38,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:38,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:34:38,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291847043] [2024-06-21 21:34:38,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:38,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:34:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:34:38,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:34:38,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:38,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 270 transitions, 3860 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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 21:34:38,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:38,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:38,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:41,806 INFO L124 PetriNetUnfolderBase]: 7115/11573 cut-off events. [2024-06-21 21:34:41,806 INFO L125 PetriNetUnfolderBase]: For 486705/486715 co-relation queries the response was YES. [2024-06-21 21:34:41,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71411 conditions, 11573 events. 7115/11573 cut-off events. For 486705/486715 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 80984 event pairs, 3268 based on Foata normal form. 15/11587 useless extension candidates. Maximal degree in co-relation 71314. Up to 10664 conditions per place. [2024-06-21 21:34:41,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 61 changer transitions 0/314 dead transitions. [2024-06-21 21:34:41,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 314 transitions, 4676 flow [2024-06-21 21:34:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:34:41,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:34:41,907 INFO L175 Difference]: Start difference. First operand has 201 places, 270 transitions, 3860 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:34:41,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 314 transitions, 4676 flow [2024-06-21 21:34:42,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 314 transitions, 4394 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 21:34:42,814 INFO L231 Difference]: Finished difference. Result has 202 places, 271 transitions, 3758 flow [2024-06-21 21:34:42,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3758, PETRI_PLACES=202, PETRI_TRANSITIONS=271} [2024-06-21 21:34:42,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-21 21:34:42,815 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 271 transitions, 3758 flow [2024-06-21 21:34:42,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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 21:34:42,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:42,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:42,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:34:42,815 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:42,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 618223791, now seen corresponding path program 4 times [2024-06-21 21:34:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:42,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910973993] [2024-06-21 21:34:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:42,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:45,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:45,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910973993] [2024-06-21 21:34:45,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910973993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:45,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:45,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:34:45,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697990599] [2024-06-21 21:34:45,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:45,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:34:45,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:45,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:34:45,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:34:45,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:34:45,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 271 transitions, 3758 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:45,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:45,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:34:45,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:48,820 INFO L124 PetriNetUnfolderBase]: 7095/11541 cut-off events. [2024-06-21 21:34:48,821 INFO L125 PetriNetUnfolderBase]: For 490025/490035 co-relation queries the response was YES. [2024-06-21 21:34:48,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70464 conditions, 11541 events. 7095/11541 cut-off events. For 490025/490035 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 80304 event pairs, 3213 based on Foata normal form. 15/11555 useless extension candidates. Maximal degree in co-relation 70366. Up to 9556 conditions per place. [2024-06-21 21:34:48,923 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 236 selfloop transitions, 73 changer transitions 0/313 dead transitions. [2024-06-21 21:34:48,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 313 transitions, 4436 flow [2024-06-21 21:34:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:34:48,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:34:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:34:48,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:34:48,925 INFO L175 Difference]: Start difference. First operand has 202 places, 271 transitions, 3758 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:34:48,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 313 transitions, 4436 flow [2024-06-21 21:34:49,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 313 transitions, 4270 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 21:34:49,699 INFO L231 Difference]: Finished difference. Result has 203 places, 270 transitions, 3656 flow [2024-06-21 21:34:49,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3656, PETRI_PLACES=203, PETRI_TRANSITIONS=270} [2024-06-21 21:34:49,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 21:34:49,700 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 270 transitions, 3656 flow [2024-06-21 21:34:49,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:49,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:49,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:49,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:34:49,700 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:49,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:49,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1593649829, now seen corresponding path program 1 times [2024-06-21 21:34:49,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:49,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396392783] [2024-06-21 21:34:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:49,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:52,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:52,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396392783] [2024-06-21 21:34:52,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396392783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:52,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:52,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:52,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351571936] [2024-06-21 21:34:52,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:52,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:52,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:34:52,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 270 transitions, 3656 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:52,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:52,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:34:52,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:34:55,361 INFO L124 PetriNetUnfolderBase]: 6789/11060 cut-off events. [2024-06-21 21:34:55,361 INFO L125 PetriNetUnfolderBase]: For 498624/498678 co-relation queries the response was YES. [2024-06-21 21:34:55,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69209 conditions, 11060 events. 6789/11060 cut-off events. For 498624/498678 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 78026 event pairs, 3224 based on Foata normal form. 20/10944 useless extension candidates. Maximal degree in co-relation 69110. Up to 10627 conditions per place. [2024-06-21 21:34:55,476 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 40 changer transitions 0/299 dead transitions. [2024-06-21 21:34:55,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 299 transitions, 4390 flow [2024-06-21 21:34:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:34:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:34:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:34:55,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 21:34:55,479 INFO L175 Difference]: Start difference. First operand has 203 places, 270 transitions, 3656 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:34:55,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 299 transitions, 4390 flow [2024-06-21 21:34:56,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 299 transitions, 4040 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-21 21:34:56,283 INFO L231 Difference]: Finished difference. Result has 200 places, 280 transitions, 3550 flow [2024-06-21 21:34:56,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3550, PETRI_PLACES=200, PETRI_TRANSITIONS=280} [2024-06-21 21:34:56,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 21:34:56,284 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 280 transitions, 3550 flow [2024-06-21 21:34:56,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:56,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:34:56,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:34:56,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:34:56,284 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:34:56,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:34:56,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1886907325, now seen corresponding path program 2 times [2024-06-21 21:34:56,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:34:56,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060705376] [2024-06-21 21:34:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:34:56,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:34:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:34:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:34:58,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:34:58,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060705376] [2024-06-21 21:34:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060705376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:34:58,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:34:58,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:34:58,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595902004] [2024-06-21 21:34:58,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:34:58,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:34:58,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:34:58,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:34:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:34:58,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:34:58,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 280 transitions, 3550 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:34:58,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:34:58,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:34:58,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:01,327 INFO L124 PetriNetUnfolderBase]: 6775/11026 cut-off events. [2024-06-21 21:35:01,328 INFO L125 PetriNetUnfolderBase]: For 509440/509502 co-relation queries the response was YES. [2024-06-21 21:35:01,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67676 conditions, 11026 events. 6775/11026 cut-off events. For 509440/509502 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 77692 event pairs, 3168 based on Foata normal form. 19/10896 useless extension candidates. Maximal degree in co-relation 67580. Up to 10581 conditions per place. [2024-06-21 21:35:01,435 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 221 selfloop transitions, 47 changer transitions 0/296 dead transitions. [2024-06-21 21:35:01,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 296 transitions, 4246 flow [2024-06-21 21:35:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:35:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:35:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:35:01,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 21:35:01,437 INFO L175 Difference]: Start difference. First operand has 200 places, 280 transitions, 3550 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:35:01,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 296 transitions, 4246 flow [2024-06-21 21:35:02,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 296 transitions, 4176 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 21:35:02,087 INFO L231 Difference]: Finished difference. Result has 203 places, 283 transitions, 3624 flow [2024-06-21 21:35:02,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3624, PETRI_PLACES=203, PETRI_TRANSITIONS=283} [2024-06-21 21:35:02,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 21:35:02,088 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 283 transitions, 3624 flow [2024-06-21 21:35:02,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:02,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:02,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:02,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:35:02,088 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:02,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1886491615, now seen corresponding path program 3 times [2024-06-21 21:35:02,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:02,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068956729] [2024-06-21 21:35:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:05,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:05,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068956729] [2024-06-21 21:35:05,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068956729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:05,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:05,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:05,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484785696] [2024-06-21 21:35:05,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:05,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:05,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:35:05,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 283 transitions, 3624 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:05,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:05,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:35:05,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:07,498 INFO L124 PetriNetUnfolderBase]: 6766/11029 cut-off events. [2024-06-21 21:35:07,498 INFO L125 PetriNetUnfolderBase]: For 529359/529408 co-relation queries the response was YES. [2024-06-21 21:35:07,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69287 conditions, 11029 events. 6766/11029 cut-off events. For 529359/529408 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 77852 event pairs, 3221 based on Foata normal form. 15/10908 useless extension candidates. Maximal degree in co-relation 69190. Up to 10587 conditions per place. [2024-06-21 21:35:07,608 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 230 selfloop transitions, 43 changer transitions 0/301 dead transitions. [2024-06-21 21:35:07,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 301 transitions, 4218 flow [2024-06-21 21:35:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:35:07,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:35:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:35:07,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:35:07,610 INFO L175 Difference]: Start difference. First operand has 203 places, 283 transitions, 3624 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:35:07,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 301 transitions, 4218 flow [2024-06-21 21:35:08,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 301 transitions, 4080 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 21:35:08,562 INFO L231 Difference]: Finished difference. Result has 205 places, 283 transitions, 3591 flow [2024-06-21 21:35:08,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3591, PETRI_PLACES=205, PETRI_TRANSITIONS=283} [2024-06-21 21:35:08,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 21:35:08,563 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 283 transitions, 3591 flow [2024-06-21 21:35:08,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:08,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:08,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:08,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:35:08,563 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:08,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash 864778145, now seen corresponding path program 1 times [2024-06-21 21:35:08,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:08,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52944115] [2024-06-21 21:35:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:08,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:10,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:10,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52944115] [2024-06-21 21:35:10,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52944115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:10,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:10,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:10,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249663630] [2024-06-21 21:35:10,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:10,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:10,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:10,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:10,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:10,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 283 transitions, 3591 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:10,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:10,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:10,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:13,398 INFO L124 PetriNetUnfolderBase]: 7143/11614 cut-off events. [2024-06-21 21:35:13,398 INFO L125 PetriNetUnfolderBase]: For 553005/553005 co-relation queries the response was YES. [2024-06-21 21:35:13,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72116 conditions, 11614 events. 7143/11614 cut-off events. For 553005/553005 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81350 event pairs, 3335 based on Foata normal form. 2/11615 useless extension candidates. Maximal degree in co-relation 72018. Up to 11225 conditions per place. [2024-06-21 21:35:13,504 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 290 selfloop transitions, 27 changer transitions 0/321 dead transitions. [2024-06-21 21:35:13,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 321 transitions, 4727 flow [2024-06-21 21:35:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:35:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:35:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:35:13,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 21:35:13,505 INFO L175 Difference]: Start difference. First operand has 205 places, 283 transitions, 3591 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:35:13,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 321 transitions, 4727 flow [2024-06-21 21:35:14,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 321 transitions, 4635 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:35:14,333 INFO L231 Difference]: Finished difference. Result has 208 places, 294 transitions, 3832 flow [2024-06-21 21:35:14,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3832, PETRI_PLACES=208, PETRI_TRANSITIONS=294} [2024-06-21 21:35:14,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 21:35:14,333 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 294 transitions, 3832 flow [2024-06-21 21:35:14,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:14,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:14,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:14,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:35:14,334 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:14,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:14,334 INFO L85 PathProgramCache]: Analyzing trace with hash 854237767, now seen corresponding path program 2 times [2024-06-21 21:35:14,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:14,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034054982] [2024-06-21 21:35:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:14,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:16,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:16,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034054982] [2024-06-21 21:35:16,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034054982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:16,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:16,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:16,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644717120] [2024-06-21 21:35:16,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:16,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:16,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:16,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:16,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 294 transitions, 3832 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:16,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:16,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:16,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:19,232 INFO L124 PetriNetUnfolderBase]: 7234/11741 cut-off events. [2024-06-21 21:35:19,232 INFO L125 PetriNetUnfolderBase]: For 573133/573133 co-relation queries the response was YES. [2024-06-21 21:35:19,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74785 conditions, 11741 events. 7234/11741 cut-off events. For 573133/573133 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82292 event pairs, 3388 based on Foata normal form. 6/11746 useless extension candidates. Maximal degree in co-relation 74685. Up to 11404 conditions per place. [2024-06-21 21:35:19,347 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 24 changer transitions 0/326 dead transitions. [2024-06-21 21:35:19,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 326 transitions, 4839 flow [2024-06-21 21:35:19,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:35:19,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 21:35:19,348 INFO L175 Difference]: Start difference. First operand has 208 places, 294 transitions, 3832 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:35:19,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 326 transitions, 4839 flow [2024-06-21 21:35:20,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 326 transitions, 4683 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-21 21:35:20,371 INFO L231 Difference]: Finished difference. Result has 215 places, 305 transitions, 3971 flow [2024-06-21 21:35:20,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3710, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3971, PETRI_PLACES=215, PETRI_TRANSITIONS=305} [2024-06-21 21:35:20,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 21:35:20,372 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 305 transitions, 3971 flow [2024-06-21 21:35:20,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:20,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:20,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:20,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:35:20,373 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:20,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash 864898301, now seen corresponding path program 1 times [2024-06-21 21:35:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:20,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358792502] [2024-06-21 21:35:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:20,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:22,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358792502] [2024-06-21 21:35:22,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358792502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:22,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:22,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:22,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258352338] [2024-06-21 21:35:22,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:22,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:22,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:22,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:22,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 305 transitions, 3971 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:22,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:22,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:22,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:25,349 INFO L124 PetriNetUnfolderBase]: 7208/11703 cut-off events. [2024-06-21 21:35:25,349 INFO L125 PetriNetUnfolderBase]: For 585741/585741 co-relation queries the response was YES. [2024-06-21 21:35:25,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74628 conditions, 11703 events. 7208/11703 cut-off events. For 585741/585741 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81963 event pairs, 3389 based on Foata normal form. 6/11708 useless extension candidates. Maximal degree in co-relation 74525. Up to 11385 conditions per place. [2024-06-21 21:35:25,453 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 297 selfloop transitions, 24 changer transitions 0/325 dead transitions. [2024-06-21 21:35:25,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 325 transitions, 4663 flow [2024-06-21 21:35:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:35:25,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 21:35:25,455 INFO L175 Difference]: Start difference. First operand has 215 places, 305 transitions, 3971 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:35:25,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 325 transitions, 4663 flow [2024-06-21 21:35:26,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 325 transitions, 4513 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 21:35:26,449 INFO L231 Difference]: Finished difference. Result has 219 places, 305 transitions, 3877 flow [2024-06-21 21:35:26,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3877, PETRI_PLACES=219, PETRI_TRANSITIONS=305} [2024-06-21 21:35:26,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 21:35:26,450 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 305 transitions, 3877 flow [2024-06-21 21:35:26,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:26,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:26,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:26,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:35:26,450 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:26,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1886675941, now seen corresponding path program 3 times [2024-06-21 21:35:26,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:26,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988868409] [2024-06-21 21:35:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:26,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:28,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:28,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988868409] [2024-06-21 21:35:28,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988868409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:28,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:28,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:28,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642366245] [2024-06-21 21:35:28,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:28,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:28,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:28,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 305 transitions, 3877 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:28,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:28,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:28,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:31,588 INFO L124 PetriNetUnfolderBase]: 7230/11735 cut-off events. [2024-06-21 21:35:31,588 INFO L125 PetriNetUnfolderBase]: For 603099/603099 co-relation queries the response was YES. [2024-06-21 21:35:31,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74874 conditions, 11735 events. 7230/11735 cut-off events. For 603099/603099 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81944 event pairs, 3338 based on Foata normal form. 6/11740 useless extension candidates. Maximal degree in co-relation 74770. Up to 11324 conditions per place. [2024-06-21 21:35:31,694 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 293 selfloop transitions, 37 changer transitions 0/334 dead transitions. [2024-06-21 21:35:31,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 334 transitions, 4750 flow [2024-06-21 21:35:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:31,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 21:35:31,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 21:35:31,696 INFO L175 Difference]: Start difference. First operand has 219 places, 305 transitions, 3877 flow. Second operand 8 states and 131 transitions. [2024-06-21 21:35:31,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 334 transitions, 4750 flow [2024-06-21 21:35:32,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 334 transitions, 4636 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:32,646 INFO L231 Difference]: Finished difference. Result has 221 places, 308 transitions, 3923 flow [2024-06-21 21:35:32,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3923, PETRI_PLACES=221, PETRI_TRANSITIONS=308} [2024-06-21 21:35:32,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 21:35:32,648 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 308 transitions, 3923 flow [2024-06-21 21:35:32,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:32,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:32,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:32,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:35:32,649 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:32,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:32,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1728414461, now seen corresponding path program 2 times [2024-06-21 21:35:32,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:32,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951317496] [2024-06-21 21:35:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:32,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:34,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951317496] [2024-06-21 21:35:34,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951317496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:34,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:34,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:34,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582324644] [2024-06-21 21:35:34,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:34,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:34,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:34,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:34,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:34,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 308 transitions, 3923 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:34,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:34,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:34,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:37,823 INFO L124 PetriNetUnfolderBase]: 7228/11733 cut-off events. [2024-06-21 21:35:37,823 INFO L125 PetriNetUnfolderBase]: For 620773/620773 co-relation queries the response was YES. [2024-06-21 21:35:37,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75228 conditions, 11733 events. 7228/11733 cut-off events. For 620773/620773 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81952 event pairs, 3335 based on Foata normal form. 6/11738 useless extension candidates. Maximal degree in co-relation 75122. Up to 11322 conditions per place. [2024-06-21 21:35:37,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 39 changer transitions 0/337 dead transitions. [2024-06-21 21:35:37,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 337 transitions, 4818 flow [2024-06-21 21:35:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:35:37,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:35:37,917 INFO L175 Difference]: Start difference. First operand has 221 places, 308 transitions, 3923 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:35:37,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 337 transitions, 4818 flow [2024-06-21 21:35:38,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 337 transitions, 4724 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:38,797 INFO L231 Difference]: Finished difference. Result has 223 places, 311 transitions, 3988 flow [2024-06-21 21:35:38,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3988, PETRI_PLACES=223, PETRI_TRANSITIONS=311} [2024-06-21 21:35:38,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 21:35:38,798 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 311 transitions, 3988 flow [2024-06-21 21:35:38,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:38,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:38,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:38,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:35:38,798 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:38,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1886913277, now seen corresponding path program 3 times [2024-06-21 21:35:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:38,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136650071] [2024-06-21 21:35:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:38,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:41,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:41,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136650071] [2024-06-21 21:35:41,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136650071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:41,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:41,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:35:41,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403581723] [2024-06-21 21:35:41,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:41,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:35:41,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:35:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:35:41,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:41,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 311 transitions, 3988 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:41,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:41,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:41,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:43,772 INFO L124 PetriNetUnfolderBase]: 7214/11714 cut-off events. [2024-06-21 21:35:43,772 INFO L125 PetriNetUnfolderBase]: For 613296/613298 co-relation queries the response was YES. [2024-06-21 21:35:43,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75003 conditions, 11714 events. 7214/11714 cut-off events. For 613296/613298 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81867 event pairs, 3338 based on Foata normal form. 4/11717 useless extension candidates. Maximal degree in co-relation 74896. Up to 11311 conditions per place. [2024-06-21 21:35:43,900 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 289 selfloop transitions, 38 changer transitions 0/331 dead transitions. [2024-06-21 21:35:43,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 331 transitions, 4692 flow [2024-06-21 21:35:43,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:35:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:35:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:35:43,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 21:35:43,902 INFO L175 Difference]: Start difference. First operand has 223 places, 311 transitions, 3988 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:35:43,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 331 transitions, 4692 flow [2024-06-21 21:35:45,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 331 transitions, 4583 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:35:45,020 INFO L231 Difference]: Finished difference. Result has 224 places, 311 transitions, 3961 flow [2024-06-21 21:35:45,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3879, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3961, PETRI_PLACES=224, PETRI_TRANSITIONS=311} [2024-06-21 21:35:45,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 21:35:45,020 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 311 transitions, 3961 flow [2024-06-21 21:35:45,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:45,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:45,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:45,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:35:45,021 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:45,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1886922205, now seen corresponding path program 1 times [2024-06-21 21:35:45,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:45,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986445618] [2024-06-21 21:35:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:45,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:48,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:48,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986445618] [2024-06-21 21:35:48,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986445618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:48,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:48,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652436546] [2024-06-21 21:35:48,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:48,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:48,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:35:48,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 311 transitions, 3961 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:48,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:48,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:35:48,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:50,680 INFO L124 PetriNetUnfolderBase]: 6874/11182 cut-off events. [2024-06-21 21:35:50,681 INFO L125 PetriNetUnfolderBase]: For 610007/610056 co-relation queries the response was YES. [2024-06-21 21:35:50,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72839 conditions, 11182 events. 6874/11182 cut-off events. For 610007/610056 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 78678 event pairs, 3236 based on Foata normal form. 13/11059 useless extension candidates. Maximal degree in co-relation 72732. Up to 10810 conditions per place. [2024-06-21 21:35:50,797 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 285 selfloop transitions, 12 changer transitions 0/325 dead transitions. [2024-06-21 21:35:50,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 325 transitions, 4617 flow [2024-06-21 21:35:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:35:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:35:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 21:35:50,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-21 21:35:50,799 INFO L175 Difference]: Start difference. First operand has 224 places, 311 transitions, 3961 flow. Second operand 6 states and 97 transitions. [2024-06-21 21:35:50,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 325 transitions, 4617 flow [2024-06-21 21:35:51,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 325 transitions, 4502 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 21:35:51,740 INFO L231 Difference]: Finished difference. Result has 223 places, 313 transitions, 3911 flow [2024-06-21 21:35:51,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3911, PETRI_PLACES=223, PETRI_TRANSITIONS=313} [2024-06-21 21:35:51,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 21:35:51,741 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 313 transitions, 3911 flow [2024-06-21 21:35:51,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:51,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:51,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:35:51,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:35:51,741 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:51,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash 707850194, now seen corresponding path program 1 times [2024-06-21 21:35:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:51,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9709331] [2024-06-21 21:35:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:51,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:35:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:35:54,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:35:54,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9709331] [2024-06-21 21:35:54,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9709331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:35:54,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:35:54,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:35:54,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070523176] [2024-06-21 21:35:54,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:35:54,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:35:54,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:35:54,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:35:54,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:35:54,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:35:54,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 313 transitions, 3911 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:54,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:35:54,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:35:54,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:35:57,419 INFO L124 PetriNetUnfolderBase]: 7197/11690 cut-off events. [2024-06-21 21:35:57,419 INFO L125 PetriNetUnfolderBase]: For 626993/626993 co-relation queries the response was YES. [2024-06-21 21:35:57,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74767 conditions, 11690 events. 7197/11690 cut-off events. For 626993/626993 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81563 event pairs, 3332 based on Foata normal form. 4/11693 useless extension candidates. Maximal degree in co-relation 74659. Up to 11264 conditions per place. [2024-06-21 21:35:57,523 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 43 changer transitions 0/341 dead transitions. [2024-06-21 21:35:57,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 341 transitions, 4655 flow [2024-06-21 21:35:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:35:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:35:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:35:57,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:35:57,525 INFO L175 Difference]: Start difference. First operand has 223 places, 313 transitions, 3911 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:35:57,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 341 transitions, 4655 flow [2024-06-21 21:35:58,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 341 transitions, 4588 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 21:35:58,620 INFO L231 Difference]: Finished difference. Result has 227 places, 313 transitions, 3936 flow [2024-06-21 21:35:58,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3936, PETRI_PLACES=227, PETRI_TRANSITIONS=313} [2024-06-21 21:35:58,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 21:35:58,620 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 313 transitions, 3936 flow [2024-06-21 21:35:58,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:35:58,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:35:58,621 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 21:35:58,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:35:58,621 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:35:58,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:35:58,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1804480070, now seen corresponding path program 1 times [2024-06-21 21:35:58,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:35:58,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302058387] [2024-06-21 21:35:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:35:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:35:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:02,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:02,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302058387] [2024-06-21 21:36:02,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302058387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:02,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:02,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:02,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568059724] [2024-06-21 21:36:02,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:02,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:02,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:02,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:02,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 313 transitions, 3936 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:02,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:02,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:02,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:05,284 INFO L124 PetriNetUnfolderBase]: 7287/11783 cut-off events. [2024-06-21 21:36:05,285 INFO L125 PetriNetUnfolderBase]: For 660459/660467 co-relation queries the response was YES. [2024-06-21 21:36:05,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76721 conditions, 11783 events. 7287/11783 cut-off events. For 660459/660467 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81963 event pairs, 3329 based on Foata normal form. 10/11792 useless extension candidates. Maximal degree in co-relation 76612. Up to 11204 conditions per place. [2024-06-21 21:36:05,401 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 69 changer transitions 0/367 dead transitions. [2024-06-21 21:36:05,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 367 transitions, 5231 flow [2024-06-21 21:36:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:36:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:36:05,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 21:36:05,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:36:05,403 INFO L175 Difference]: Start difference. First operand has 227 places, 313 transitions, 3936 flow. Second operand 10 states and 175 transitions. [2024-06-21 21:36:05,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 367 transitions, 5231 flow [2024-06-21 21:36:06,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 367 transitions, 5091 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:36:06,448 INFO L231 Difference]: Finished difference. Result has 229 places, 322 transitions, 4124 flow [2024-06-21 21:36:06,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3796, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4124, PETRI_PLACES=229, PETRI_TRANSITIONS=322} [2024-06-21 21:36:06,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 21:36:06,448 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 322 transitions, 4124 flow [2024-06-21 21:36:06,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:06,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:06,449 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 21:36:06,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:36:06,449 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:06,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1804600226, now seen corresponding path program 1 times [2024-06-21 21:36:06,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:06,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800088002] [2024-06-21 21:36:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:06,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:09,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:09,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800088002] [2024-06-21 21:36:09,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800088002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:09,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:09,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:09,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990470185] [2024-06-21 21:36:09,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:09,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:09,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:09,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:09,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 322 transitions, 4124 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:09,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:09,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:09,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:12,762 INFO L124 PetriNetUnfolderBase]: 7352/11900 cut-off events. [2024-06-21 21:36:12,762 INFO L125 PetriNetUnfolderBase]: For 696493/696501 co-relation queries the response was YES. [2024-06-21 21:36:12,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79146 conditions, 11900 events. 7352/11900 cut-off events. For 696493/696501 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83100 event pairs, 3397 based on Foata normal form. 14/11913 useless extension candidates. Maximal degree in co-relation 79037. Up to 11507 conditions per place. [2024-06-21 21:36:12,880 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 46 changer transitions 3/363 dead transitions. [2024-06-21 21:36:12,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 363 transitions, 5075 flow [2024-06-21 21:36:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 21:36:12,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 21:36:12,881 INFO L175 Difference]: Start difference. First operand has 229 places, 322 transitions, 4124 flow. Second operand 9 states and 146 transitions. [2024-06-21 21:36:12,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 363 transitions, 5075 flow [2024-06-21 21:36:14,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 363 transitions, 4917 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:14,178 INFO L231 Difference]: Finished difference. Result has 235 places, 332 transitions, 4225 flow [2024-06-21 21:36:14,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4225, PETRI_PLACES=235, PETRI_TRANSITIONS=332} [2024-06-21 21:36:14,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 21:36:14,178 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 332 transitions, 4225 flow [2024-06-21 21:36:14,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:14,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:14,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:14,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:36:14,179 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:14,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:14,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1981968896, now seen corresponding path program 2 times [2024-06-21 21:36:14,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:14,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261107599] [2024-06-21 21:36:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:14,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:17,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:17,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261107599] [2024-06-21 21:36:17,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261107599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:17,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:17,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:17,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759442274] [2024-06-21 21:36:17,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:17,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:17,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:17,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:17,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 332 transitions, 4225 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:17,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:17,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:17,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:20,285 INFO L124 PetriNetUnfolderBase]: 7520/12122 cut-off events. [2024-06-21 21:36:20,285 INFO L125 PetriNetUnfolderBase]: For 733404/733412 co-relation queries the response was YES. [2024-06-21 21:36:20,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81692 conditions, 12122 events. 7520/12122 cut-off events. For 733404/733412 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 84178 event pairs, 3378 based on Foata normal form. 10/12131 useless extension candidates. Maximal degree in co-relation 81579. Up to 11615 conditions per place. [2024-06-21 21:36:20,406 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 71 changer transitions 1/386 dead transitions. [2024-06-21 21:36:20,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 386 transitions, 5527 flow [2024-06-21 21:36:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:36:20,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 21:36:20,408 INFO L175 Difference]: Start difference. First operand has 235 places, 332 transitions, 4225 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:36:20,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 386 transitions, 5527 flow [2024-06-21 21:36:21,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 386 transitions, 5420 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:36:21,905 INFO L231 Difference]: Finished difference. Result has 241 places, 358 transitions, 4681 flow [2024-06-21 21:36:21,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4681, PETRI_PLACES=241, PETRI_TRANSITIONS=358} [2024-06-21 21:36:21,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-21 21:36:21,906 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 358 transitions, 4681 flow [2024-06-21 21:36:21,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:21,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:21,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:21,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:36:21,906 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:21,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1981731746, now seen corresponding path program 3 times [2024-06-21 21:36:21,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:21,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763302059] [2024-06-21 21:36:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:25,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:25,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763302059] [2024-06-21 21:36:25,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763302059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:25,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:25,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996704024] [2024-06-21 21:36:25,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:25,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:25,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:25,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:25,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:25,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 358 transitions, 4681 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:25,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:25,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:25,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:28,397 INFO L124 PetriNetUnfolderBase]: 7490/12089 cut-off events. [2024-06-21 21:36:28,398 INFO L125 PetriNetUnfolderBase]: For 755435/755443 co-relation queries the response was YES. [2024-06-21 21:36:28,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82027 conditions, 12089 events. 7490/12089 cut-off events. For 755435/755443 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 84029 event pairs, 3402 based on Foata normal form. 14/12102 useless extension candidates. Maximal degree in co-relation 81911. Up to 11596 conditions per place. [2024-06-21 21:36:28,536 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 68 changer transitions 2/387 dead transitions. [2024-06-21 21:36:28,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 387 transitions, 5631 flow [2024-06-21 21:36:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:36:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:36:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 21:36:28,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-21 21:36:28,537 INFO L175 Difference]: Start difference. First operand has 241 places, 358 transitions, 4681 flow. Second operand 10 states and 159 transitions. [2024-06-21 21:36:28,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 387 transitions, 5631 flow [2024-06-21 21:36:30,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 387 transitions, 5577 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 21:36:30,274 INFO L231 Difference]: Finished difference. Result has 248 places, 356 transitions, 4731 flow [2024-06-21 21:36:30,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4731, PETRI_PLACES=248, PETRI_TRANSITIONS=356} [2024-06-21 21:36:30,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 21:36:30,275 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 356 transitions, 4731 flow [2024-06-21 21:36:30,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:30,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:30,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:30,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:36:30,275 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:30,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:30,275 INFO L85 PathProgramCache]: Analyzing trace with hash -87777502, now seen corresponding path program 1 times [2024-06-21 21:36:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:30,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862520106] [2024-06-21 21:36:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:34,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862520106] [2024-06-21 21:36:34,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862520106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:34,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:34,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:36:34,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277947314] [2024-06-21 21:36:34,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:34,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:36:34,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:34,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:36:34,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:36:34,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:36:34,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 356 transitions, 4731 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:34,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:34,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:36:34,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:37,390 INFO L124 PetriNetUnfolderBase]: 7149/11594 cut-off events. [2024-06-21 21:36:37,390 INFO L125 PetriNetUnfolderBase]: For 798174/798235 co-relation queries the response was YES. [2024-06-21 21:36:37,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80384 conditions, 11594 events. 7149/11594 cut-off events. For 798174/798235 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 81521 event pairs, 3277 based on Foata normal form. 28/11478 useless extension candidates. Maximal degree in co-relation 80267. Up to 11024 conditions per place. [2024-06-21 21:36:37,526 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 298 selfloop transitions, 42 changer transitions 0/383 dead transitions. [2024-06-21 21:36:37,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 383 transitions, 5533 flow [2024-06-21 21:36:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:36:37,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:36:37,527 INFO L175 Difference]: Start difference. First operand has 248 places, 356 transitions, 4731 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:36:37,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 383 transitions, 5533 flow [2024-06-21 21:36:39,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 383 transitions, 5409 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:36:39,504 INFO L231 Difference]: Finished difference. Result has 250 places, 358 transitions, 4736 flow [2024-06-21 21:36:39,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4736, PETRI_PLACES=250, PETRI_TRANSITIONS=358} [2024-06-21 21:36:39,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 21:36:39,504 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 358 transitions, 4736 flow [2024-06-21 21:36:39,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:39,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:39,505 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 21:36:39,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:36:39,505 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:39,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:39,505 INFO L85 PathProgramCache]: Analyzing trace with hash 457080100, now seen corresponding path program 2 times [2024-06-21 21:36:39,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:39,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097170269] [2024-06-21 21:36:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:42,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097170269] [2024-06-21 21:36:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097170269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:42,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:42,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:42,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169247317] [2024-06-21 21:36:42,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:42,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:42,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:42,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:42,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:42,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:42,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 358 transitions, 4736 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:42,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:42,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:42,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:45,773 INFO L124 PetriNetUnfolderBase]: 7604/12290 cut-off events. [2024-06-21 21:36:45,773 INFO L125 PetriNetUnfolderBase]: For 816171/816183 co-relation queries the response was YES. [2024-06-21 21:36:45,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84613 conditions, 12290 events. 7604/12290 cut-off events. For 816171/816183 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85628 event pairs, 2861 based on Foata normal form. 14/12303 useless extension candidates. Maximal degree in co-relation 84496. Up to 11183 conditions per place. [2024-06-21 21:36:45,915 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 137 changer transitions 0/414 dead transitions. [2024-06-21 21:36:45,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 414 transitions, 6460 flow [2024-06-21 21:36:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:36:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:36:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:36:45,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:36:45,916 INFO L175 Difference]: Start difference. First operand has 250 places, 358 transitions, 4736 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:36:45,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 414 transitions, 6460 flow [2024-06-21 21:36:47,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 414 transitions, 6367 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:36:47,946 INFO L231 Difference]: Finished difference. Result has 254 places, 378 transitions, 5510 flow [2024-06-21 21:36:47,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5510, PETRI_PLACES=254, PETRI_TRANSITIONS=378} [2024-06-21 21:36:47,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 21:36:47,946 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 378 transitions, 5510 flow [2024-06-21 21:36:47,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:47,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:47,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:47,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:36:47,947 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:47,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1883838786, now seen corresponding path program 3 times [2024-06-21 21:36:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:47,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532885252] [2024-06-21 21:36:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:50,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:50,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532885252] [2024-06-21 21:36:50,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532885252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:50,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:50,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:50,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029724120] [2024-06-21 21:36:50,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:50,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:50,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:50,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:50,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 378 transitions, 5510 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:50,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:50,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:50,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:36:54,106 INFO L124 PetriNetUnfolderBase]: 7598/12252 cut-off events. [2024-06-21 21:36:54,106 INFO L125 PetriNetUnfolderBase]: For 850613/850625 co-relation queries the response was YES. [2024-06-21 21:36:54,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87150 conditions, 12252 events. 7598/12252 cut-off events. For 850613/850625 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85311 event pairs, 3404 based on Foata normal form. 14/12265 useless extension candidates. Maximal degree in co-relation 87030. Up to 11731 conditions per place. [2024-06-21 21:36:54,247 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 335 selfloop transitions, 71 changer transitions 0/410 dead transitions. [2024-06-21 21:36:54,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 410 transitions, 6524 flow [2024-06-21 21:36:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:36:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:36:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 21:36:54,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 21:36:54,248 INFO L175 Difference]: Start difference. First operand has 254 places, 378 transitions, 5510 flow. Second operand 9 states and 149 transitions. [2024-06-21 21:36:54,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 410 transitions, 6524 flow [2024-06-21 21:36:55,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 410 transitions, 6356 flow, removed 83 selfloop flow, removed 1 redundant places. [2024-06-21 21:36:55,987 INFO L231 Difference]: Finished difference. Result has 262 places, 378 transitions, 5490 flow [2024-06-21 21:36:55,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5342, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5490, PETRI_PLACES=262, PETRI_TRANSITIONS=378} [2024-06-21 21:36:55,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 21:36:55,988 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 378 transitions, 5490 flow [2024-06-21 21:36:55,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:55,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:36:55,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:36:55,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:36:55,988 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:36:55,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:36:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1407875678, now seen corresponding path program 4 times [2024-06-21 21:36:55,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:36:55,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574234771] [2024-06-21 21:36:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:36:55,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:36:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:36:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:36:59,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:36:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574234771] [2024-06-21 21:36:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574234771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:36:59,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:36:59,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:36:59,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174550840] [2024-06-21 21:36:59,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:36:59,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:36:59,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:36:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:36:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:36:59,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:36:59,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 378 transitions, 5490 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:36:59,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:36:59,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:36:59,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:02,974 INFO L124 PetriNetUnfolderBase]: 7572/12225 cut-off events. [2024-06-21 21:37:02,974 INFO L125 PetriNetUnfolderBase]: For 863572/863584 co-relation queries the response was YES. [2024-06-21 21:37:03,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85599 conditions, 12225 events. 7572/12225 cut-off events. For 863572/863584 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85274 event pairs, 3432 based on Foata normal form. 18/12242 useless extension candidates. Maximal degree in co-relation 85476. Up to 11827 conditions per place. [2024-06-21 21:37:03,104 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 53 changer transitions 3/404 dead transitions. [2024-06-21 21:37:03,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 404 transitions, 6360 flow [2024-06-21 21:37:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:37:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:37:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:37:03,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 21:37:03,105 INFO L175 Difference]: Start difference. First operand has 262 places, 378 transitions, 5490 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:37:03,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 404 transitions, 6360 flow [2024-06-21 21:37:04,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 404 transitions, 6111 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 21:37:04,966 INFO L231 Difference]: Finished difference. Result has 264 places, 376 transitions, 5322 flow [2024-06-21 21:37:04,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5241, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5322, PETRI_PLACES=264, PETRI_TRANSITIONS=376} [2024-06-21 21:37:04,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 21:37:04,966 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 376 transitions, 5322 flow [2024-06-21 21:37:04,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:04,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:04,967 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 21:37:04,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:37:04,967 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:04,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:04,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2123167776, now seen corresponding path program 4 times [2024-06-21 21:37:04,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:04,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65627237] [2024-06-21 21:37:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:04,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:08,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:08,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65627237] [2024-06-21 21:37:08,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65627237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:08,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:08,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646328329] [2024-06-21 21:37:08,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:08,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:08,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:08,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:08,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:08,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 376 transitions, 5322 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:08,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:08,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:08,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:11,536 INFO L124 PetriNetUnfolderBase]: 7558/12225 cut-off events. [2024-06-21 21:37:11,537 INFO L125 PetriNetUnfolderBase]: For 883326/883338 co-relation queries the response was YES. [2024-06-21 21:37:11,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85683 conditions, 12225 events. 7558/12225 cut-off events. For 883326/883338 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85199 event pairs, 2892 based on Foata normal form. 14/12238 useless extension candidates. Maximal degree in co-relation 85559. Up to 11151 conditions per place. [2024-06-21 21:37:11,690 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 138 changer transitions 0/409 dead transitions. [2024-06-21 21:37:11,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 409 transitions, 6531 flow [2024-06-21 21:37:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:37:11,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:37:11,691 INFO L175 Difference]: Start difference. First operand has 264 places, 376 transitions, 5322 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:37:11,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 409 transitions, 6531 flow [2024-06-21 21:37:13,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 409 transitions, 6420 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:37:13,348 INFO L231 Difference]: Finished difference. Result has 266 places, 379 transitions, 5574 flow [2024-06-21 21:37:13,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5211, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5574, PETRI_PLACES=266, PETRI_TRANSITIONS=379} [2024-06-21 21:37:13,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 21:37:13,349 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 379 transitions, 5574 flow [2024-06-21 21:37:13,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:13,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:13,350 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 21:37:13,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:37:13,350 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:13,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2056508350, now seen corresponding path program 5 times [2024-06-21 21:37:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:13,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470520843] [2024-06-21 21:37:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:13,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:16,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:16,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470520843] [2024-06-21 21:37:16,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470520843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:16,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:16,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:16,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25371794] [2024-06-21 21:37:16,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:16,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:16,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:16,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:16,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 379 transitions, 5574 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:16,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:16,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:16,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:19,634 INFO L124 PetriNetUnfolderBase]: 7759/12480 cut-off events. [2024-06-21 21:37:19,634 INFO L125 PetriNetUnfolderBase]: For 952087/952099 co-relation queries the response was YES. [2024-06-21 21:37:19,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89810 conditions, 12480 events. 7759/12480 cut-off events. For 952087/952099 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86777 event pairs, 3418 based on Foata normal form. 18/12497 useless extension candidates. Maximal degree in co-relation 89686. Up to 11873 conditions per place. [2024-06-21 21:37:19,787 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 335 selfloop transitions, 89 changer transitions 0/428 dead transitions. [2024-06-21 21:37:19,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 428 transitions, 7182 flow [2024-06-21 21:37:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-21 21:37:19,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 21:37:19,788 INFO L175 Difference]: Start difference. First operand has 266 places, 379 transitions, 5574 flow. Second operand 10 states and 154 transitions. [2024-06-21 21:37:19,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 428 transitions, 7182 flow [2024-06-21 21:37:21,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 428 transitions, 6871 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:21,194 INFO L231 Difference]: Finished difference. Result has 273 places, 401 transitions, 5973 flow [2024-06-21 21:37:21,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5291, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5973, PETRI_PLACES=273, PETRI_TRANSITIONS=401} [2024-06-21 21:37:21,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 21:37:21,194 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 401 transitions, 5973 flow [2024-06-21 21:37:21,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:21,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:21,194 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 21:37:21,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:37:21,195 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:21,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash 583562146, now seen corresponding path program 5 times [2024-06-21 21:37:21,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:21,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909223241] [2024-06-21 21:37:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:21,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:24,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:24,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909223241] [2024-06-21 21:37:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909223241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:24,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:24,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613389279] [2024-06-21 21:37:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:24,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:24,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:24,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 401 transitions, 5973 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:24,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:24,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:24,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:28,307 INFO L124 PetriNetUnfolderBase]: 7733/12452 cut-off events. [2024-06-21 21:37:28,307 INFO L125 PetriNetUnfolderBase]: For 969537/969549 co-relation queries the response was YES. [2024-06-21 21:37:28,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89517 conditions, 12452 events. 7733/12452 cut-off events. For 969537/969549 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86699 event pairs, 3475 based on Foata normal form. 18/12469 useless extension candidates. Maximal degree in co-relation 89390. Up to 12051 conditions per place. [2024-06-21 21:37:28,423 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 359 selfloop transitions, 58 changer transitions 3/424 dead transitions. [2024-06-21 21:37:28,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 424 transitions, 6884 flow [2024-06-21 21:37:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-21 21:37:28,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-21 21:37:28,425 INFO L175 Difference]: Start difference. First operand has 273 places, 401 transitions, 5973 flow. Second operand 10 states and 147 transitions. [2024-06-21 21:37:28,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 424 transitions, 6884 flow [2024-06-21 21:37:30,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 424 transitions, 6715 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:30,244 INFO L231 Difference]: Finished difference. Result has 279 places, 399 transitions, 5885 flow [2024-06-21 21:37:30,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5885, PETRI_PLACES=279, PETRI_TRANSITIONS=399} [2024-06-21 21:37:30,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 21:37:30,245 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 399 transitions, 5885 flow [2024-06-21 21:37:30,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:30,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:30,245 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 21:37:30,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:37:30,245 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:30,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:30,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2056329604, now seen corresponding path program 6 times [2024-06-21 21:37:30,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:30,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918083314] [2024-06-21 21:37:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:30,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:33,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:33,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918083314] [2024-06-21 21:37:33,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918083314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:33,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:33,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:33,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354379233] [2024-06-21 21:37:33,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:33,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:33,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:33,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:33,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 399 transitions, 5885 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:33,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:33,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:33,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:36,764 INFO L124 PetriNetUnfolderBase]: 7723/12440 cut-off events. [2024-06-21 21:37:36,764 INFO L125 PetriNetUnfolderBase]: For 992142/992154 co-relation queries the response was YES. [2024-06-21 21:37:36,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89396 conditions, 12440 events. 7723/12440 cut-off events. For 992142/992154 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86673 event pairs, 3438 based on Foata normal form. 18/12457 useless extension candidates. Maximal degree in co-relation 89268. Up to 11851 conditions per place. [2024-06-21 21:37:36,895 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 335 selfloop transitions, 90 changer transitions 0/429 dead transitions. [2024-06-21 21:37:36,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 429 transitions, 7127 flow [2024-06-21 21:37:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:37:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:37:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-21 21:37:36,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 21:37:36,896 INFO L175 Difference]: Start difference. First operand has 279 places, 399 transitions, 5885 flow. Second operand 10 states and 154 transitions. [2024-06-21 21:37:36,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 429 transitions, 7127 flow [2024-06-21 21:37:37,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 429 transitions, 6996 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:37:38,002 INFO L231 Difference]: Finished difference. Result has 282 places, 402 transitions, 6002 flow [2024-06-21 21:37:38,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5754, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6002, PETRI_PLACES=282, PETRI_TRANSITIONS=402} [2024-06-21 21:37:38,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 21:37:38,003 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 402 transitions, 6002 flow [2024-06-21 21:37:38,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:38,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:38,003 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 21:37:38,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:37:38,003 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:38,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:38,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1122272254, now seen corresponding path program 7 times [2024-06-21 21:37:38,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:38,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840637246] [2024-06-21 21:37:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:38,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:41,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:41,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840637246] [2024-06-21 21:37:41,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840637246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:41,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:41,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:41,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542733529] [2024-06-21 21:37:41,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:41,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:41,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:41,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:41,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:41,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:41,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 402 transitions, 6002 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:41,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:41,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:41,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:44,754 INFO L124 PetriNetUnfolderBase]: 7801/12562 cut-off events. [2024-06-21 21:37:44,755 INFO L125 PetriNetUnfolderBase]: For 1033151/1033163 co-relation queries the response was YES. [2024-06-21 21:37:44,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91349 conditions, 12562 events. 7801/12562 cut-off events. For 1033151/1033163 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87372 event pairs, 2896 based on Foata normal form. 18/12579 useless extension candidates. Maximal degree in co-relation 91220. Up to 11468 conditions per place. [2024-06-21 21:37:44,907 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 157 changer transitions 0/445 dead transitions. [2024-06-21 21:37:44,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 445 transitions, 7478 flow [2024-06-21 21:37:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:37:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:37:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:37:44,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 21:37:44,909 INFO L175 Difference]: Start difference. First operand has 282 places, 402 transitions, 6002 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:37:44,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 445 transitions, 7478 flow [2024-06-21 21:37:46,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 445 transitions, 7244 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 21:37:46,455 INFO L231 Difference]: Finished difference. Result has 284 places, 414 transitions, 6414 flow [2024-06-21 21:37:46,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5768, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6414, PETRI_PLACES=284, PETRI_TRANSITIONS=414} [2024-06-21 21:37:46,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 21:37:46,455 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 414 transitions, 6414 flow [2024-06-21 21:37:46,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:46,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:46,456 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 21:37:46,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:37:46,456 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:46,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:46,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1122278020, now seen corresponding path program 6 times [2024-06-21 21:37:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:46,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757409169] [2024-06-21 21:37:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:49,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:49,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757409169] [2024-06-21 21:37:49,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757409169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:49,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:49,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268759115] [2024-06-21 21:37:49,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:49,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:49,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:49,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:49,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 414 transitions, 6414 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:49,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:49,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:49,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:52,687 INFO L124 PetriNetUnfolderBase]: 7783/12538 cut-off events. [2024-06-21 21:37:52,687 INFO L125 PetriNetUnfolderBase]: For 1052999/1053011 co-relation queries the response was YES. [2024-06-21 21:37:52,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91890 conditions, 12538 events. 7783/12538 cut-off events. For 1052999/1053011 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87182 event pairs, 2889 based on Foata normal form. 18/12555 useless extension candidates. Maximal degree in co-relation 91759. Up to 11457 conditions per place. [2024-06-21 21:37:52,833 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 161 changer transitions 0/449 dead transitions. [2024-06-21 21:37:52,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 449 transitions, 7656 flow [2024-06-21 21:37:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:37:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:37:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:37:52,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 21:37:52,834 INFO L175 Difference]: Start difference. First operand has 284 places, 414 transitions, 6414 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:37:52,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 449 transitions, 7656 flow [2024-06-21 21:37:54,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 449 transitions, 7426 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-21 21:37:54,954 INFO L231 Difference]: Finished difference. Result has 288 places, 414 transitions, 6526 flow [2024-06-21 21:37:54,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6526, PETRI_PLACES=288, PETRI_TRANSITIONS=414} [2024-06-21 21:37:54,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 21:37:54,954 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 414 transitions, 6526 flow [2024-06-21 21:37:54,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:54,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:54,955 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 21:37:54,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:37:54,955 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:54,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash -242645776, now seen corresponding path program 8 times [2024-06-21 21:37:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:54,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602404244] [2024-06-21 21:37:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:54,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:58,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602404244] [2024-06-21 21:37:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602404244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:58,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:58,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:58,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899635972] [2024-06-21 21:37:58,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:58,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:58,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:58,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:58,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:37:58,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 414 transitions, 6526 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:58,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:58,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:37:58,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:01,562 INFO L124 PetriNetUnfolderBase]: 7649/12260 cut-off events. [2024-06-21 21:38:01,562 INFO L125 PetriNetUnfolderBase]: For 1041294/1041306 co-relation queries the response was YES. [2024-06-21 21:38:01,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90679 conditions, 12260 events. 7649/12260 cut-off events. For 1041294/1041306 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 84556 event pairs, 3365 based on Foata normal form. 18/12277 useless extension candidates. Maximal degree in co-relation 90548. Up to 11805 conditions per place. [2024-06-21 21:38:01,713 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 70 changer transitions 4/443 dead transitions. [2024-06-21 21:38:01,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 443 transitions, 7484 flow [2024-06-21 21:38:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:01,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:38:01,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:38:01,714 INFO L175 Difference]: Start difference. First operand has 288 places, 414 transitions, 6526 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:38:01,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 443 transitions, 7484 flow [2024-06-21 21:38:03,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 443 transitions, 7137 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:38:03,514 INFO L231 Difference]: Finished difference. Result has 288 places, 411 transitions, 6287 flow [2024-06-21 21:38:03,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6179, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6287, PETRI_PLACES=288, PETRI_TRANSITIONS=411} [2024-06-21 21:38:03,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 21:38:03,515 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 411 transitions, 6287 flow [2024-06-21 21:38:03,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:03,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:03,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:03,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:38:03,515 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:03,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:03,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1115070334, now seen corresponding path program 9 times [2024-06-21 21:38:03,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:03,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221574382] [2024-06-21 21:38:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:03,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:06,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:06,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221574382] [2024-06-21 21:38:06,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221574382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:06,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:06,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:06,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357777163] [2024-06-21 21:38:06,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:06,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:06,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:06,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:06,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 411 transitions, 6287 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:06,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:06,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:06,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:09,770 INFO L124 PetriNetUnfolderBase]: 7323/11729 cut-off events. [2024-06-21 21:38:09,771 INFO L125 PetriNetUnfolderBase]: For 1027684/1027710 co-relation queries the response was YES. [2024-06-21 21:38:09,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87964 conditions, 11729 events. 7323/11729 cut-off events. For 1027684/1027710 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 79937 event pairs, 2758 based on Foata normal form. 28/11756 useless extension candidates. Maximal degree in co-relation 87832. Up to 10720 conditions per place. [2024-06-21 21:38:09,915 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 153 changer transitions 0/441 dead transitions. [2024-06-21 21:38:09,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 441 transitions, 7691 flow [2024-06-21 21:38:09,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:38:09,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:38:09,916 INFO L175 Difference]: Start difference. First operand has 288 places, 411 transitions, 6287 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:38:09,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 441 transitions, 7691 flow [2024-06-21 21:38:11,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 441 transitions, 7521 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 21:38:11,877 INFO L231 Difference]: Finished difference. Result has 287 places, 414 transitions, 6513 flow [2024-06-21 21:38:11,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6513, PETRI_PLACES=287, PETRI_TRANSITIONS=414} [2024-06-21 21:38:11,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 21:38:11,877 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 414 transitions, 6513 flow [2024-06-21 21:38:11,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:11,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:11,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:11,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:38:11,878 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:11,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:11,878 INFO L85 PathProgramCache]: Analyzing trace with hash 847518844, now seen corresponding path program 10 times [2024-06-21 21:38:11,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:11,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61365139] [2024-06-21 21:38:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:11,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:14,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:14,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61365139] [2024-06-21 21:38:14,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61365139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:14,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:14,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:14,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041056471] [2024-06-21 21:38:14,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:14,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:14,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:14,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:14,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:14,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 414 transitions, 6513 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:14,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:14,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:14,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:17,679 INFO L124 PetriNetUnfolderBase]: 7317/11727 cut-off events. [2024-06-21 21:38:17,680 INFO L125 PetriNetUnfolderBase]: For 997839/997865 co-relation queries the response was YES. [2024-06-21 21:38:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87789 conditions, 11727 events. 7317/11727 cut-off events. For 997839/997865 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 79951 event pairs, 2765 based on Foata normal form. 28/11754 useless extension candidates. Maximal degree in co-relation 87658. Up to 10717 conditions per place. [2024-06-21 21:38:17,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 153 changer transitions 0/440 dead transitions. [2024-06-21 21:38:17,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 440 transitions, 7835 flow [2024-06-21 21:38:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:38:17,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 21:38:17,823 INFO L175 Difference]: Start difference. First operand has 287 places, 414 transitions, 6513 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:38:17,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 440 transitions, 7835 flow [2024-06-21 21:38:19,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 440 transitions, 7429 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:19,713 INFO L231 Difference]: Finished difference. Result has 289 places, 414 transitions, 6419 flow [2024-06-21 21:38:19,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6107, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6419, PETRI_PLACES=289, PETRI_TRANSITIONS=414} [2024-06-21 21:38:19,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 21:38:19,713 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 414 transitions, 6419 flow [2024-06-21 21:38:19,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:19,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:19,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:19,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:38:19,714 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:19,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:19,714 INFO L85 PathProgramCache]: Analyzing trace with hash 442070464, now seen corresponding path program 11 times [2024-06-21 21:38:19,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:19,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515171281] [2024-06-21 21:38:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:19,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:23,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:23,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515171281] [2024-06-21 21:38:23,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515171281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:23,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:23,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:23,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522865277] [2024-06-21 21:38:23,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:23,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:23,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:23,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:23,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 414 transitions, 6419 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:23,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:23,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:23,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:26,779 INFO L124 PetriNetUnfolderBase]: 7299/11664 cut-off events. [2024-06-21 21:38:26,779 INFO L125 PetriNetUnfolderBase]: For 1022862/1022870 co-relation queries the response was YES. [2024-06-21 21:38:26,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87365 conditions, 11664 events. 7299/11664 cut-off events. For 1022862/1022870 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 79452 event pairs, 3143 based on Foata normal form. 14/11677 useless extension candidates. Maximal degree in co-relation 87234. Up to 11102 conditions per place. [2024-06-21 21:38:26,894 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 350 selfloop transitions, 99 changer transitions 1/454 dead transitions. [2024-06-21 21:38:26,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 454 transitions, 7557 flow [2024-06-21 21:38:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:38:26,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:38:26,895 INFO L175 Difference]: Start difference. First operand has 289 places, 414 transitions, 6419 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:38:26,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 454 transitions, 7557 flow [2024-06-21 21:38:28,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 454 transitions, 7050 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:38:28,254 INFO L231 Difference]: Finished difference. Result has 290 places, 413 transitions, 6101 flow [2024-06-21 21:38:28,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5912, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6101, PETRI_PLACES=290, PETRI_TRANSITIONS=413} [2024-06-21 21:38:28,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 21:38:28,254 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 413 transitions, 6101 flow [2024-06-21 21:38:28,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:28,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:28,254 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 21:38:28,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:38:28,255 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:28,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1126688824, now seen corresponding path program 12 times [2024-06-21 21:38:28,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:28,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268010732] [2024-06-21 21:38:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:28,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:32,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:32,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268010732] [2024-06-21 21:38:32,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268010732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:32,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:32,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:32,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374240523] [2024-06-21 21:38:32,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:32,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:32,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:32,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:38:32,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 413 transitions, 6101 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:32,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:32,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:38:32,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:35,500 INFO L124 PetriNetUnfolderBase]: 7173/11423 cut-off events. [2024-06-21 21:38:35,500 INFO L125 PetriNetUnfolderBase]: For 1031727/1031735 co-relation queries the response was YES. [2024-06-21 21:38:35,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85870 conditions, 11423 events. 7173/11423 cut-off events. For 1031727/1031735 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 77280 event pairs, 3042 based on Foata normal form. 10/11432 useless extension candidates. Maximal degree in co-relation 85739. Up to 10887 conditions per place. [2024-06-21 21:38:35,659 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 96 changer transitions 4/442 dead transitions. [2024-06-21 21:38:35,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 442 transitions, 7055 flow [2024-06-21 21:38:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:38:35,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:38:35,661 INFO L175 Difference]: Start difference. First operand has 290 places, 413 transitions, 6101 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:38:35,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 442 transitions, 7055 flow [2024-06-21 21:38:37,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 442 transitions, 6874 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:37,909 INFO L231 Difference]: Finished difference. Result has 291 places, 410 transitions, 6074 flow [2024-06-21 21:38:37,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6074, PETRI_PLACES=291, PETRI_TRANSITIONS=410} [2024-06-21 21:38:37,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 21:38:37,910 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 410 transitions, 6074 flow [2024-06-21 21:38:37,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:37,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:37,910 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 21:38:37,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:38:37,910 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:37,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash 841813852, now seen corresponding path program 2 times [2024-06-21 21:38:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863774129] [2024-06-21 21:38:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:41,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:41,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863774129] [2024-06-21 21:38:41,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863774129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:41,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:41,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:41,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988591936] [2024-06-21 21:38:41,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:41,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:41,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:41,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:38:41,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 410 transitions, 6074 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:41,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:41,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:38:41,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:44,717 INFO L124 PetriNetUnfolderBase]: 6604/10553 cut-off events. [2024-06-21 21:38:44,717 INFO L125 PetriNetUnfolderBase]: For 1043371/1043403 co-relation queries the response was YES. [2024-06-21 21:38:45,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81430 conditions, 10553 events. 6604/10553 cut-off events. For 1043371/1043403 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 71204 event pairs, 2773 based on Foata normal form. 25/10499 useless extension candidates. Maximal degree in co-relation 81299. Up to 9981 conditions per place. [2024-06-21 21:38:45,073 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 317 selfloop transitions, 50 changer transitions 0/429 dead transitions. [2024-06-21 21:38:45,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 429 transitions, 6898 flow [2024-06-21 21:38:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 21:38:45,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 21:38:45,075 INFO L175 Difference]: Start difference. First operand has 291 places, 410 transitions, 6074 flow. Second operand 7 states and 115 transitions. [2024-06-21 21:38:45,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 429 transitions, 6898 flow [2024-06-21 21:38:46,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 429 transitions, 6644 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:38:46,509 INFO L231 Difference]: Finished difference. Result has 288 places, 411 transitions, 5950 flow [2024-06-21 21:38:46,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5950, PETRI_PLACES=288, PETRI_TRANSITIONS=411} [2024-06-21 21:38:46,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 21:38:46,510 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 411 transitions, 5950 flow [2024-06-21 21:38:46,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:46,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:46,510 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 21:38:46,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:38:46,511 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:46,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1114643836, now seen corresponding path program 3 times [2024-06-21 21:38:46,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:46,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76633107] [2024-06-21 21:38:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:46,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:50,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:50,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76633107] [2024-06-21 21:38:50,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76633107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:50,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:50,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:50,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919175202] [2024-06-21 21:38:50,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:50,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:50,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:50,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:50,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:50,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:38:50,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 411 transitions, 5950 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:50,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:50,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:38:50,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:53,299 INFO L124 PetriNetUnfolderBase]: 6689/10691 cut-off events. [2024-06-21 21:38:53,299 INFO L125 PetriNetUnfolderBase]: For 1031565/1031597 co-relation queries the response was YES. [2024-06-21 21:38:53,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82399 conditions, 10691 events. 6689/10691 cut-off events. For 1031565/1031597 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 72295 event pairs, 2790 based on Foata normal form. 21/10630 useless extension candidates. Maximal degree in co-relation 82268. Up to 9917 conditions per place. [2024-06-21 21:38:53,423 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 317 selfloop transitions, 56 changer transitions 0/435 dead transitions. [2024-06-21 21:38:53,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 435 transitions, 6978 flow [2024-06-21 21:38:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:38:53,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 21:38:53,424 INFO L175 Difference]: Start difference. First operand has 288 places, 411 transitions, 5950 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:38:53,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 435 transitions, 6978 flow [2024-06-21 21:38:55,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 435 transitions, 6868 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 21:38:55,486 INFO L231 Difference]: Finished difference. Result has 291 places, 414 transitions, 6041 flow [2024-06-21 21:38:55,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5840, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6041, PETRI_PLACES=291, PETRI_TRANSITIONS=414} [2024-06-21 21:38:55,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 21:38:55,487 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 414 transitions, 6041 flow [2024-06-21 21:38:55,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:55,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:55,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:38:55,487 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:55,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1277811102, now seen corresponding path program 4 times [2024-06-21 21:38:55,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:55,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111573552] [2024-06-21 21:38:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:59,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:59,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111573552] [2024-06-21 21:38:59,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111573552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:59,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:59,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:59,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830456605] [2024-06-21 21:38:59,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:59,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:59,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:59,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:38:59,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 414 transitions, 6041 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:59,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:59,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:38:59,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:02,272 INFO L124 PetriNetUnfolderBase]: 6648/10639 cut-off events. [2024-06-21 21:39:02,272 INFO L125 PetriNetUnfolderBase]: For 1045294/1045329 co-relation queries the response was YES. [2024-06-21 21:39:02,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81479 conditions, 10639 events. 6648/10639 cut-off events. For 1045294/1045329 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72097 event pairs, 2857 based on Foata normal form. 26/10590 useless extension candidates. Maximal degree in co-relation 81346. Up to 9992 conditions per place. [2024-06-21 21:39:02,400 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 329 selfloop transitions, 47 changer transitions 0/438 dead transitions. [2024-06-21 21:39:02,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 438 transitions, 6879 flow [2024-06-21 21:39:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:39:02,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 21:39:02,401 INFO L175 Difference]: Start difference. First operand has 291 places, 414 transitions, 6041 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:39:02,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 438 transitions, 6879 flow [2024-06-21 21:39:04,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 438 transitions, 6778 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:04,644 INFO L231 Difference]: Finished difference. Result has 294 places, 414 transitions, 6046 flow [2024-06-21 21:39:04,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5940, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6046, PETRI_PLACES=294, PETRI_TRANSITIONS=414} [2024-06-21 21:39:04,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 21:39:04,644 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 414 transitions, 6046 flow [2024-06-21 21:39:04,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:04,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:04,644 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 21:39:04,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:39:04,645 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:04,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2123058594, now seen corresponding path program 1 times [2024-06-21 21:39:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:04,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072596820] [2024-06-21 21:39:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:04,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:07,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:07,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072596820] [2024-06-21 21:39:07,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072596820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:07,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:07,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:07,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620169403] [2024-06-21 21:39:07,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:07,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:07,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:07,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:07,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 414 transitions, 6046 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:07,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:07,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:07,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:10,845 INFO L124 PetriNetUnfolderBase]: 7014/11153 cut-off events. [2024-06-21 21:39:10,845 INFO L125 PetriNetUnfolderBase]: For 1071530/1071530 co-relation queries the response was YES. [2024-06-21 21:39:10,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85988 conditions, 11153 events. 7014/11153 cut-off events. For 1071530/1071530 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74669 event pairs, 2800 based on Foata normal form. 2/11154 useless extension candidates. Maximal degree in co-relation 85854. Up to 10684 conditions per place. [2024-06-21 21:39:10,989 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 48 changer transitions 0/455 dead transitions. [2024-06-21 21:39:10,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 455 transitions, 7364 flow [2024-06-21 21:39:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:10,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:10,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:39:10,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:39:10,993 INFO L175 Difference]: Start difference. First operand has 294 places, 414 transitions, 6046 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:39:10,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 455 transitions, 7364 flow [2024-06-21 21:39:13,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 455 transitions, 7259 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:13,165 INFO L231 Difference]: Finished difference. Result has 296 places, 418 transitions, 6210 flow [2024-06-21 21:39:13,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5941, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6210, PETRI_PLACES=296, PETRI_TRANSITIONS=418} [2024-06-21 21:39:13,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 21:39:13,166 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 418 transitions, 6210 flow [2024-06-21 21:39:13,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:13,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:13,166 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 21:39:13,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:39:13,167 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:13,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:13,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2123061384, now seen corresponding path program 2 times [2024-06-21 21:39:13,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:13,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810334520] [2024-06-21 21:39:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:13,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:16,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:16,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810334520] [2024-06-21 21:39:16,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810334520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:16,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:16,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:16,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827562221] [2024-06-21 21:39:16,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:16,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:16,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:16,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:16,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:16,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:16,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 418 transitions, 6210 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:16,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:16,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:16,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:19,471 INFO L124 PetriNetUnfolderBase]: 7022/11167 cut-off events. [2024-06-21 21:39:19,472 INFO L125 PetriNetUnfolderBase]: For 1104000/1104000 co-relation queries the response was YES. [2024-06-21 21:39:19,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86739 conditions, 11167 events. 7022/11167 cut-off events. For 1104000/1104000 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74761 event pairs, 2836 based on Foata normal form. 2/11168 useless extension candidates. Maximal degree in co-relation 86604. Up to 10821 conditions per place. [2024-06-21 21:39:19,611 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 398 selfloop transitions, 45 changer transitions 0/447 dead transitions. [2024-06-21 21:39:19,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 447 transitions, 7250 flow [2024-06-21 21:39:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:39:19,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:39:19,612 INFO L175 Difference]: Start difference. First operand has 296 places, 418 transitions, 6210 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:39:19,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 447 transitions, 7250 flow [2024-06-21 21:39:21,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 447 transitions, 7101 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:21,489 INFO L231 Difference]: Finished difference. Result has 300 places, 420 transitions, 6246 flow [2024-06-21 21:39:21,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6069, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6246, PETRI_PLACES=300, PETRI_TRANSITIONS=420} [2024-06-21 21:39:21,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 21:39:21,490 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 420 transitions, 6246 flow [2024-06-21 21:39:21,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:21,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:21,490 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 21:39:21,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:39:21,490 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:21,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash 583808038, now seen corresponding path program 3 times [2024-06-21 21:39:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:21,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310427096] [2024-06-21 21:39:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:21,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310427096] [2024-06-21 21:39:25,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310427096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:25,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:25,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:25,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085604610] [2024-06-21 21:39:25,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:25,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:25,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:25,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:25,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 420 transitions, 6246 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:39:25,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:25,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:25,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:28,115 INFO L124 PetriNetUnfolderBase]: 7074/11247 cut-off events. [2024-06-21 21:39:28,115 INFO L125 PetriNetUnfolderBase]: For 1165416/1165416 co-relation queries the response was YES. [2024-06-21 21:39:28,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87807 conditions, 11247 events. 7074/11247 cut-off events. For 1165416/1165416 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75583 event pairs, 2950 based on Foata normal form. 14/11260 useless extension candidates. Maximal degree in co-relation 87670. Up to 10957 conditions per place. [2024-06-21 21:39:28,257 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 28 changer transitions 0/450 dead transitions. [2024-06-21 21:39:28,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 450 transitions, 7326 flow [2024-06-21 21:39:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-21 21:39:28,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-21 21:39:28,258 INFO L175 Difference]: Start difference. First operand has 300 places, 420 transitions, 6246 flow. Second operand 10 states and 148 transitions. [2024-06-21 21:39:28,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 450 transitions, 7326 flow [2024-06-21 21:39:30,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 450 transitions, 7167 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:30,773 INFO L231 Difference]: Finished difference. Result has 304 places, 423 transitions, 6251 flow [2024-06-21 21:39:30,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6089, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6251, PETRI_PLACES=304, PETRI_TRANSITIONS=423} [2024-06-21 21:39:30,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 21:39:30,774 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 423 transitions, 6251 flow [2024-06-21 21:39:30,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:39:30,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:30,774 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 21:39:30,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:39:30,774 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:30,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:30,774 INFO L85 PathProgramCache]: Analyzing trace with hash 583992736, now seen corresponding path program 1 times [2024-06-21 21:39:30,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:30,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025588587] [2024-06-21 21:39:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:30,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:34,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:34,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025588587] [2024-06-21 21:39:34,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025588587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:34,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:34,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342706474] [2024-06-21 21:39:34,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:34,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:34,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:34,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:34,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:34,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 423 transitions, 6251 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:39:34,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:34,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:34,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:38,066 INFO L124 PetriNetUnfolderBase]: 7126/11327 cut-off events. [2024-06-21 21:39:38,066 INFO L125 PetriNetUnfolderBase]: For 1196899/1196899 co-relation queries the response was YES. [2024-06-21 21:39:38,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88615 conditions, 11327 events. 7126/11327 cut-off events. For 1196899/1196899 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 76072 event pairs, 2958 based on Foata normal form. 14/11340 useless extension candidates. Maximal degree in co-relation 88477. Up to 11037 conditions per place. [2024-06-21 21:39:38,227 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 27 changer transitions 0/452 dead transitions. [2024-06-21 21:39:38,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 452 transitions, 7291 flow [2024-06-21 21:39:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 21:39:38,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 21:39:38,229 INFO L175 Difference]: Start difference. First operand has 304 places, 423 transitions, 6251 flow. Second operand 9 states and 140 transitions. [2024-06-21 21:39:38,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 452 transitions, 7291 flow [2024-06-21 21:39:39,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 452 transitions, 7175 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:39,873 INFO L231 Difference]: Finished difference. Result has 306 places, 425 transitions, 6253 flow [2024-06-21 21:39:39,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6135, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6253, PETRI_PLACES=306, PETRI_TRANSITIONS=425} [2024-06-21 21:39:39,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 21:39:39,873 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 425 transitions, 6253 flow [2024-06-21 21:39:39,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:39:39,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:39,873 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 21:39:39,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:39:39,873 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:39,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash 619447876, now seen corresponding path program 4 times [2024-06-21 21:39:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:39,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569673609] [2024-06-21 21:39:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:43,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569673609] [2024-06-21 21:39:43,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569673609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:43,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:43,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:43,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147821081] [2024-06-21 21:39:43,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:43,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:43,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:43,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:43,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 425 transitions, 6253 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:39:43,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:43,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:43,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:46,601 INFO L124 PetriNetUnfolderBase]: 7093/11274 cut-off events. [2024-06-21 21:39:46,601 INFO L125 PetriNetUnfolderBase]: For 1192063/1192063 co-relation queries the response was YES. [2024-06-21 21:39:46,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87625 conditions, 11274 events. 7093/11274 cut-off events. For 1192063/1192063 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75529 event pairs, 2785 based on Foata normal form. 14/11287 useless extension candidates. Maximal degree in co-relation 87486. Up to 10826 conditions per place. [2024-06-21 21:39:46,724 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 47 changer transitions 0/461 dead transitions. [2024-06-21 21:39:46,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 461 transitions, 7283 flow [2024-06-21 21:39:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:39:46,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:39:46,725 INFO L175 Difference]: Start difference. First operand has 306 places, 425 transitions, 6253 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:39:46,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 461 transitions, 7283 flow [2024-06-21 21:39:48,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 461 transitions, 7131 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:48,547 INFO L231 Difference]: Finished difference. Result has 308 places, 425 transitions, 6208 flow [2024-06-21 21:39:48,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6101, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6208, PETRI_PLACES=308, PETRI_TRANSITIONS=425} [2024-06-21 21:39:48,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 21:39:48,547 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 425 transitions, 6208 flow [2024-06-21 21:39:48,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:39:48,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:48,547 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 21:39:48,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:39:48,547 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:48,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash 855807934, now seen corresponding path program 2 times [2024-06-21 21:39:48,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:48,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562726499] [2024-06-21 21:39:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:48,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:52,268 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 21:39:52,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:52,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562726499] [2024-06-21 21:39:52,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562726499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:52,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:52,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:52,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160288028] [2024-06-21 21:39:52,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:52,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:52,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:39:52,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 425 transitions, 6208 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:39:52,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:52,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:39:52,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:55,740 INFO L124 PetriNetUnfolderBase]: 7101/11292 cut-off events. [2024-06-21 21:39:55,740 INFO L125 PetriNetUnfolderBase]: For 1190409/1190409 co-relation queries the response was YES. [2024-06-21 21:39:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88032 conditions, 11292 events. 7101/11292 cut-off events. For 1190409/1190409 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75687 event pairs, 2833 based on Foata normal form. 2/11293 useless extension candidates. Maximal degree in co-relation 87892. Up to 10962 conditions per place. [2024-06-21 21:39:55,887 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 49 changer transitions 0/459 dead transitions. [2024-06-21 21:39:55,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 459 transitions, 7318 flow [2024-06-21 21:39:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 21:39:55,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 21:39:55,888 INFO L175 Difference]: Start difference. First operand has 308 places, 425 transitions, 6208 flow. Second operand 9 states and 141 transitions. [2024-06-21 21:39:55,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 459 transitions, 7318 flow [2024-06-21 21:39:57,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 459 transitions, 7207 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:39:57,621 INFO L231 Difference]: Finished difference. Result has 309 places, 432 transitions, 6342 flow [2024-06-21 21:39:57,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6105, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6342, PETRI_PLACES=309, PETRI_TRANSITIONS=432} [2024-06-21 21:39:57,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 21:39:57,622 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 432 transitions, 6342 flow [2024-06-21 21:39:57,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:39:57,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:57,622 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 21:39:57,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:39:57,622 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:57,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash 856104604, now seen corresponding path program 3 times [2024-06-21 21:39:57,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206393828] [2024-06-21 21:39:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:01,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:01,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206393828] [2024-06-21 21:40:01,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206393828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:01,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:01,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:01,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000930925] [2024-06-21 21:40:01,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:01,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:01,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:01,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:01,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:01,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:01,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 432 transitions, 6342 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:01,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:01,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:01,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:04,267 INFO L124 PetriNetUnfolderBase]: 7168/11390 cut-off events. [2024-06-21 21:40:04,267 INFO L125 PetriNetUnfolderBase]: For 1218123/1218125 co-relation queries the response was YES. [2024-06-21 21:40:04,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89364 conditions, 11390 events. 7168/11390 cut-off events. For 1218123/1218125 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 76337 event pairs, 2826 based on Foata normal form. 4/11393 useless extension candidates. Maximal degree in co-relation 89223. Up to 10917 conditions per place. [2024-06-21 21:40:04,424 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 52 changer transitions 0/463 dead transitions. [2024-06-21 21:40:04,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 463 transitions, 7580 flow [2024-06-21 21:40:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:40:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:40:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:40:04,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:40:04,425 INFO L175 Difference]: Start difference. First operand has 309 places, 432 transitions, 6342 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:40:04,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 463 transitions, 7580 flow [2024-06-21 21:40:06,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 463 transitions, 7457 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:06,573 INFO L231 Difference]: Finished difference. Result has 312 places, 435 transitions, 6416 flow [2024-06-21 21:40:06,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6416, PETRI_PLACES=312, PETRI_TRANSITIONS=435} [2024-06-21 21:40:06,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 21:40:06,573 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 435 transitions, 6416 flow [2024-06-21 21:40:06,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:06,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:06,573 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 21:40:06,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:40:06,574 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:06,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash 731051469, now seen corresponding path program 1 times [2024-06-21 21:40:06,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:06,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256263721] [2024-06-21 21:40:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:06,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:10,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:10,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256263721] [2024-06-21 21:40:10,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256263721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:10,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:10,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:10,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237371800] [2024-06-21 21:40:10,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:10,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:10,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:10,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:10,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:10,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 435 transitions, 6416 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:10,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:10,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:10,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:13,667 INFO L124 PetriNetUnfolderBase]: 7150/11369 cut-off events. [2024-06-21 21:40:13,667 INFO L125 PetriNetUnfolderBase]: For 1244539/1244545 co-relation queries the response was YES. [2024-06-21 21:40:13,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89140 conditions, 11369 events. 7150/11369 cut-off events. For 1244539/1244545 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 76131 event pairs, 2740 based on Foata normal form. 14/11382 useless extension candidates. Maximal degree in co-relation 88998. Up to 10998 conditions per place. [2024-06-21 21:40:13,805 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 424 selfloop transitions, 46 changer transitions 0/474 dead transitions. [2024-06-21 21:40:13,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 474 transitions, 7475 flow [2024-06-21 21:40:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:40:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:40:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 21:40:13,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 21:40:13,806 INFO L175 Difference]: Start difference. First operand has 312 places, 435 transitions, 6416 flow. Second operand 9 states and 149 transitions. [2024-06-21 21:40:13,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 474 transitions, 7475 flow [2024-06-21 21:40:16,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 474 transitions, 7361 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 21:40:16,135 INFO L231 Difference]: Finished difference. Result has 317 places, 436 transitions, 6403 flow [2024-06-21 21:40:16,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6403, PETRI_PLACES=317, PETRI_TRANSITIONS=436} [2024-06-21 21:40:16,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 21:40:16,135 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 436 transitions, 6403 flow [2024-06-21 21:40:16,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:16,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:16,136 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 21:40:16,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:40:16,136 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:16,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:16,136 INFO L85 PathProgramCache]: Analyzing trace with hash -733332091, now seen corresponding path program 2 times [2024-06-21 21:40:16,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:16,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351400733] [2024-06-21 21:40:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:16,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:19,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:19,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351400733] [2024-06-21 21:40:19,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351400733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:19,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:19,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216377264] [2024-06-21 21:40:19,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:19,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:19,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:19,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:19,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:19,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 436 transitions, 6403 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:19,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:19,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:19,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:23,244 INFO L124 PetriNetUnfolderBase]: 7242/11517 cut-off events. [2024-06-21 21:40:23,244 INFO L125 PetriNetUnfolderBase]: For 1276253/1276259 co-relation queries the response was YES. [2024-06-21 21:40:23,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90446 conditions, 11517 events. 7242/11517 cut-off events. For 1276253/1276259 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 77440 event pairs, 2979 based on Foata normal form. 14/11530 useless extension candidates. Maximal degree in co-relation 90302. Up to 11148 conditions per place. [2024-06-21 21:40:23,389 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 54 changer transitions 0/488 dead transitions. [2024-06-21 21:40:23,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 488 transitions, 7703 flow [2024-06-21 21:40:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 21:40:23,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:40:23,391 INFO L175 Difference]: Start difference. First operand has 317 places, 436 transitions, 6403 flow. Second operand 10 states and 160 transitions. [2024-06-21 21:40:23,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 488 transitions, 7703 flow [2024-06-21 21:40:25,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 488 transitions, 7447 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 21:40:25,872 INFO L231 Difference]: Finished difference. Result has 320 places, 449 transitions, 6481 flow [2024-06-21 21:40:25,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6481, PETRI_PLACES=320, PETRI_TRANSITIONS=449} [2024-06-21 21:40:25,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 21:40:25,873 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 449 transitions, 6481 flow [2024-06-21 21:40:25,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:25,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:25,873 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 21:40:25,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:40:25,873 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:25,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1300321387, now seen corresponding path program 3 times [2024-06-21 21:40:25,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:25,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917645071] [2024-06-21 21:40:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:25,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:29,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:29,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917645071] [2024-06-21 21:40:29,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917645071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:29,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:29,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:29,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081991358] [2024-06-21 21:40:29,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:29,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:29,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:29,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:29,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 449 transitions, 6481 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:29,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:29,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:29,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:32,956 INFO L124 PetriNetUnfolderBase]: 7278/11570 cut-off events. [2024-06-21 21:40:32,956 INFO L125 PetriNetUnfolderBase]: For 1306002/1306002 co-relation queries the response was YES. [2024-06-21 21:40:33,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90607 conditions, 11570 events. 7278/11570 cut-off events. For 1306002/1306002 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 77779 event pairs, 3004 based on Foata normal form. 8/11577 useless extension candidates. Maximal degree in co-relation 90463. Up to 11186 conditions per place. [2024-06-21 21:40:33,102 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 57 changer transitions 0/485 dead transitions. [2024-06-21 21:40:33,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 485 transitions, 7598 flow [2024-06-21 21:40:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:40:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:40:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-21 21:40:33,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-21 21:40:33,104 INFO L175 Difference]: Start difference. First operand has 320 places, 449 transitions, 6481 flow. Second operand 11 states and 166 transitions. [2024-06-21 21:40:33,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 485 transitions, 7598 flow [2024-06-21 21:40:35,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 485 transitions, 7496 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:35,560 INFO L231 Difference]: Finished difference. Result has 327 places, 452 transitions, 6549 flow [2024-06-21 21:40:35,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6549, PETRI_PLACES=327, PETRI_TRANSITIONS=452} [2024-06-21 21:40:35,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 21:40:35,561 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 452 transitions, 6549 flow [2024-06-21 21:40:35,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:35,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:35,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:35,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:40:35,561 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:35,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash 856819183, now seen corresponding path program 1 times [2024-06-21 21:40:35,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:35,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033501844] [2024-06-21 21:40:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:35,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:39,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:39,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033501844] [2024-06-21 21:40:39,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033501844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:39,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:39,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:39,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525867129] [2024-06-21 21:40:39,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:39,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:39,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:39,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:39,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 452 transitions, 6549 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:39,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:39,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:39,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:42,844 INFO L124 PetriNetUnfolderBase]: 7320/11635 cut-off events. [2024-06-21 21:40:42,845 INFO L125 PetriNetUnfolderBase]: For 1338897/1338903 co-relation queries the response was YES. [2024-06-21 21:40:42,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91842 conditions, 11635 events. 7320/11635 cut-off events. For 1338897/1338903 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 78310 event pairs, 2838 based on Foata normal form. 8/11642 useless extension candidates. Maximal degree in co-relation 91696. Up to 11056 conditions per place. [2024-06-21 21:40:42,997 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 405 selfloop transitions, 96 changer transitions 0/505 dead transitions. [2024-06-21 21:40:42,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 505 transitions, 8125 flow [2024-06-21 21:40:42,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:40:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:40:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-21 21:40:42,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-21 21:40:42,998 INFO L175 Difference]: Start difference. First operand has 327 places, 452 transitions, 6549 flow. Second operand 11 states and 186 transitions. [2024-06-21 21:40:42,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 505 transitions, 8125 flow [2024-06-21 21:40:45,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 505 transitions, 7996 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 21:40:45,904 INFO L231 Difference]: Finished difference. Result has 332 places, 458 transitions, 6808 flow [2024-06-21 21:40:45,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6808, PETRI_PLACES=332, PETRI_TRANSITIONS=458} [2024-06-21 21:40:45,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-21 21:40:45,905 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 458 transitions, 6808 flow [2024-06-21 21:40:45,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:45,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:45,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:45,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:40:45,906 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:45,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:45,906 INFO L85 PathProgramCache]: Analyzing trace with hash -39759691, now seen corresponding path program 1 times [2024-06-21 21:40:45,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:45,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192128535] [2024-06-21 21:40:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:45,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:49,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:49,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192128535] [2024-06-21 21:40:49,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192128535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:49,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:49,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352053281] [2024-06-21 21:40:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:49,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:49,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:49,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:49,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 458 transitions, 6808 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:49,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:49,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:49,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:53,116 INFO L124 PetriNetUnfolderBase]: 7310/11619 cut-off events. [2024-06-21 21:40:53,116 INFO L125 PetriNetUnfolderBase]: For 1374488/1374494 co-relation queries the response was YES. [2024-06-21 21:40:53,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93725 conditions, 11619 events. 7310/11619 cut-off events. For 1374488/1374494 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 77939 event pairs, 2938 based on Foata normal form. 12/11630 useless extension candidates. Maximal degree in co-relation 93578. Up to 11236 conditions per place. [2024-06-21 21:40:53,266 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 424 selfloop transitions, 69 changer transitions 0/497 dead transitions. [2024-06-21 21:40:53,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 497 transitions, 8061 flow [2024-06-21 21:40:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:40:53,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:40:53,268 INFO L175 Difference]: Start difference. First operand has 332 places, 458 transitions, 6808 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:40:53,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 497 transitions, 8061 flow [2024-06-21 21:40:55,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 497 transitions, 7796 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-21 21:40:55,953 INFO L231 Difference]: Finished difference. Result has 334 places, 459 transitions, 6700 flow [2024-06-21 21:40:55,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6543, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6700, PETRI_PLACES=334, PETRI_TRANSITIONS=459} [2024-06-21 21:40:55,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-21 21:40:55,954 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 459 transitions, 6700 flow [2024-06-21 21:40:55,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:55,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:55,954 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 21:40:55,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:40:55,954 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:55,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:55,954 INFO L85 PathProgramCache]: Analyzing trace with hash -740858403, now seen corresponding path program 2 times [2024-06-21 21:40:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:55,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543488406] [2024-06-21 21:40:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:59,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:59,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543488406] [2024-06-21 21:40:59,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543488406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:59,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:59,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:59,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209615667] [2024-06-21 21:40:59,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:59,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:59,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:59,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:59,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:59,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:40:59,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 459 transitions, 6700 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:40:59,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:59,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:40:59,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:03,135 INFO L124 PetriNetUnfolderBase]: 7284/11583 cut-off events. [2024-06-21 21:41:03,136 INFO L125 PetriNetUnfolderBase]: For 1387679/1387685 co-relation queries the response was YES. [2024-06-21 21:41:03,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93297 conditions, 11583 events. 7284/11583 cut-off events. For 1387679/1387685 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 77605 event pairs, 2982 based on Foata normal form. 12/11594 useless extension candidates. Maximal degree in co-relation 93149. Up to 11217 conditions per place. [2024-06-21 21:41:03,293 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 423 selfloop transitions, 69 changer transitions 0/496 dead transitions. [2024-06-21 21:41:03,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 496 transitions, 7784 flow [2024-06-21 21:41:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:41:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:41:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 21:41:03,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 21:41:03,295 INFO L175 Difference]: Start difference. First operand has 334 places, 459 transitions, 6700 flow. Second operand 10 states and 164 transitions. [2024-06-21 21:41:03,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 496 transitions, 7784 flow [2024-06-21 21:41:07,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 496 transitions, 7525 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 21:41:07,061 INFO L231 Difference]: Finished difference. Result has 336 places, 459 transitions, 6587 flow [2024-06-21 21:41:07,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6441, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6587, PETRI_PLACES=336, PETRI_TRANSITIONS=459} [2024-06-21 21:41:07,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 21:41:07,062 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 459 transitions, 6587 flow [2024-06-21 21:41:07,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:07,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:07,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:07,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:41:07,062 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:07,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1086445449, now seen corresponding path program 2 times [2024-06-21 21:41:07,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:07,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508404219] [2024-06-21 21:41:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:07,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:11,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:11,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508404219] [2024-06-21 21:41:11,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508404219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:11,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:11,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:41:11,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916258134] [2024-06-21 21:41:11,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:11,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:41:11,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:41:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:41:11,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:11,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 459 transitions, 6587 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:11,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:11,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:11,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:15,037 INFO L124 PetriNetUnfolderBase]: 7378/11715 cut-off events. [2024-06-21 21:41:15,037 INFO L125 PetriNetUnfolderBase]: For 1423204/1423210 co-relation queries the response was YES. [2024-06-21 21:41:15,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93390 conditions, 11715 events. 7378/11715 cut-off events. For 1423204/1423210 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 78435 event pairs, 2951 based on Foata normal form. 12/11726 useless extension candidates. Maximal degree in co-relation 93242. Up to 11268 conditions per place. [2024-06-21 21:41:15,226 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 428 selfloop transitions, 86 changer transitions 1/519 dead transitions. [2024-06-21 21:41:15,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 519 transitions, 8183 flow [2024-06-21 21:41:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:41:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:41:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2024-06-21 21:41:15,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2024-06-21 21:41:15,227 INFO L175 Difference]: Start difference. First operand has 336 places, 459 transitions, 6587 flow. Second operand 13 states and 204 transitions. [2024-06-21 21:41:15,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 519 transitions, 8183 flow [2024-06-21 21:41:18,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 519 transitions, 8003 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 21:41:18,813 INFO L231 Difference]: Finished difference. Result has 341 places, 474 transitions, 6876 flow [2024-06-21 21:41:18,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6419, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6876, PETRI_PLACES=341, PETRI_TRANSITIONS=474} [2024-06-21 21:41:18,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-21 21:41:18,813 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 474 transitions, 6876 flow [2024-06-21 21:41:18,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:18,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:18,813 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 21:41:18,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:41:18,814 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:18,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:18,814 INFO L85 PathProgramCache]: Analyzing trace with hash 151605779, now seen corresponding path program 3 times [2024-06-21 21:41:18,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:18,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849045901] [2024-06-21 21:41:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:18,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849045901] [2024-06-21 21:41:22,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849045901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:22,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:22,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:41:22,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170558421] [2024-06-21 21:41:22,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:22,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:41:22,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:22,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:41:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:41:22,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:22,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 474 transitions, 6876 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:22,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:22,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:22,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:25,980 INFO L124 PetriNetUnfolderBase]: 7360/11691 cut-off events. [2024-06-21 21:41:25,980 INFO L125 PetriNetUnfolderBase]: For 1436987/1436993 co-relation queries the response was YES. [2024-06-21 21:41:26,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93553 conditions, 11691 events. 7360/11691 cut-off events. For 1436987/1436993 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 78277 event pairs, 2956 based on Foata normal form. 8/11698 useless extension candidates. Maximal degree in co-relation 93403. Up to 11257 conditions per place. [2024-06-21 21:41:26,169 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 422 selfloop transitions, 87 changer transitions 2/515 dead transitions. [2024-06-21 21:41:26,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 515 transitions, 8022 flow [2024-06-21 21:41:26,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:41:26,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:41:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-21 21:41:26,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 21:41:26,171 INFO L175 Difference]: Start difference. First operand has 341 places, 474 transitions, 6876 flow. Second operand 12 states and 188 transitions. [2024-06-21 21:41:26,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 515 transitions, 8022 flow [2024-06-21 21:41:29,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 515 transitions, 7894 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 21:41:29,790 INFO L231 Difference]: Finished difference. Result has 345 places, 473 transitions, 6912 flow [2024-06-21 21:41:29,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6912, PETRI_PLACES=345, PETRI_TRANSITIONS=473} [2024-06-21 21:41:29,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 21:41:29,791 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 473 transitions, 6912 flow [2024-06-21 21:41:29,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:29,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:29,791 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 21:41:29,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:41:29,791 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:29,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash 8309333, now seen corresponding path program 3 times [2024-06-21 21:41:29,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:29,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551966000] [2024-06-21 21:41:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:29,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:33,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:33,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551966000] [2024-06-21 21:41:33,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551966000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:33,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:33,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:41:33,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058416007] [2024-06-21 21:41:33,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:41:33,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:41:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:41:33,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:33,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 473 transitions, 6912 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:33,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:33,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:33,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:36,764 INFO L124 PetriNetUnfolderBase]: 7442/11799 cut-off events. [2024-06-21 21:41:36,764 INFO L125 PetriNetUnfolderBase]: For 1512712/1512714 co-relation queries the response was YES. [2024-06-21 21:41:36,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96243 conditions, 11799 events. 7442/11799 cut-off events. For 1512712/1512714 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 78883 event pairs, 2821 based on Foata normal form. 4/11802 useless extension candidates. Maximal degree in co-relation 96091. Up to 10357 conditions per place. [2024-06-21 21:41:36,945 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 333 selfloop transitions, 207 changer transitions 0/544 dead transitions. [2024-06-21 21:41:36,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 544 transitions, 8982 flow [2024-06-21 21:41:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:41:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:41:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 222 transitions. [2024-06-21 21:41:36,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:41:36,946 INFO L175 Difference]: Start difference. First operand has 345 places, 473 transitions, 6912 flow. Second operand 12 states and 222 transitions. [2024-06-21 21:41:36,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 544 transitions, 8982 flow [2024-06-21 21:41:40,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 544 transitions, 8818 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:41:40,742 INFO L231 Difference]: Finished difference. Result has 348 places, 482 transitions, 7376 flow [2024-06-21 21:41:40,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7376, PETRI_PLACES=348, PETRI_TRANSITIONS=482} [2024-06-21 21:41:40,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 21:41:40,743 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 482 transitions, 7376 flow [2024-06-21 21:41:40,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:40,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:40,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:40,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:41:40,743 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:40,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash 98768459, now seen corresponding path program 4 times [2024-06-21 21:41:40,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:40,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41637863] [2024-06-21 21:41:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:40,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:44,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:44,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41637863] [2024-06-21 21:41:44,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41637863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:44,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:44,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:41:44,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699224609] [2024-06-21 21:41:44,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:44,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:41:44,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:41:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:41:44,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:44,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 482 transitions, 7376 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:44,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:44,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:44,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:48,214 INFO L124 PetriNetUnfolderBase]: 7507/11900 cut-off events. [2024-06-21 21:41:48,215 INFO L125 PetriNetUnfolderBase]: For 1568607/1568609 co-relation queries the response was YES. [2024-06-21 21:41:48,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99735 conditions, 11900 events. 7507/11900 cut-off events. For 1568607/1568609 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 79680 event pairs, 3027 based on Foata normal form. 8/11907 useless extension candidates. Maximal degree in co-relation 99582. Up to 11422 conditions per place. [2024-06-21 21:41:48,359 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 417 selfloop transitions, 103 changer transitions 3/527 dead transitions. [2024-06-21 21:41:48,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 527 transitions, 8673 flow [2024-06-21 21:41:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:41:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:41:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 21:41:48,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 21:41:48,360 INFO L175 Difference]: Start difference. First operand has 348 places, 482 transitions, 7376 flow. Second operand 10 states and 164 transitions. [2024-06-21 21:41:48,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 527 transitions, 8673 flow [2024-06-21 21:41:51,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 527 transitions, 8376 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:51,159 INFO L231 Difference]: Finished difference. Result has 353 places, 492 transitions, 7463 flow [2024-06-21 21:41:51,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7088, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7463, PETRI_PLACES=353, PETRI_TRANSITIONS=492} [2024-06-21 21:41:51,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-21 21:41:51,160 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 492 transitions, 7463 flow [2024-06-21 21:41:51,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:51,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:51,160 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 21:41:51,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:41:51,160 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:51,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:51,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1189073391, now seen corresponding path program 4 times [2024-06-21 21:41:51,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:51,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283565314] [2024-06-21 21:41:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:51,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:54,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:54,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283565314] [2024-06-21 21:41:54,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283565314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:54,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:54,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:41:54,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982103136] [2024-06-21 21:41:54,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:54,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:41:54,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:54,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:41:54,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:41:54,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:41:54,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 492 transitions, 7463 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:41:54,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:54,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:41:54,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:58,617 INFO L124 PetriNetUnfolderBase]: 7493/11882 cut-off events. [2024-06-21 21:41:58,617 INFO L125 PetriNetUnfolderBase]: For 1588676/1588678 co-relation queries the response was YES. [2024-06-21 21:41:58,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98467 conditions, 11882 events. 7493/11882 cut-off events. For 1588676/1588678 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 79478 event pairs, 2805 based on Foata normal form. 4/11885 useless extension candidates. Maximal degree in co-relation 98311. Up to 10393 conditions per place. [2024-06-21 21:41:58,763 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 321 selfloop transitions, 223 changer transitions 0/548 dead transitions. [2024-06-21 21:41:58,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 548 transitions, 9459 flow [2024-06-21 21:41:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:41:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:41:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-21 21:41:58,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:41:58,765 INFO L175 Difference]: Start difference. First operand has 353 places, 492 transitions, 7463 flow. Second operand 11 states and 198 transitions. [2024-06-21 21:41:58,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 548 transitions, 9459 flow [2024-06-21 21:42:01,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 548 transitions, 9224 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:01,663 INFO L231 Difference]: Finished difference. Result has 359 places, 498 transitions, 7910 flow [2024-06-21 21:42:01,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7228, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7910, PETRI_PLACES=359, PETRI_TRANSITIONS=498} [2024-06-21 21:42:01,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 21:42:01,664 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 498 transitions, 7910 flow [2024-06-21 21:42:01,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:01,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:01,664 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 21:42:01,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:42:01,665 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:01,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:01,665 INFO L85 PathProgramCache]: Analyzing trace with hash 13970615, now seen corresponding path program 1 times [2024-06-21 21:42:01,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:01,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139462202] [2024-06-21 21:42:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:01,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:05,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:05,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139462202] [2024-06-21 21:42:05,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139462202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:05,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:05,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:05,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932496543] [2024-06-21 21:42:05,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:05,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:05,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:05,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:05,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 498 transitions, 7910 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:05,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:05,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:05,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:09,641 INFO L124 PetriNetUnfolderBase]: 7481/11853 cut-off events. [2024-06-21 21:42:09,641 INFO L125 PetriNetUnfolderBase]: For 1619796/1619804 co-relation queries the response was YES. [2024-06-21 21:42:09,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99252 conditions, 11853 events. 7481/11853 cut-off events. For 1619796/1619804 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 79235 event pairs, 2977 based on Foata normal form. 12/11864 useless extension candidates. Maximal degree in co-relation 99094. Up to 11283 conditions per place. [2024-06-21 21:42:09,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 109 changer transitions 0/542 dead transitions. [2024-06-21 21:42:09,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 542 transitions, 9270 flow [2024-06-21 21:42:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:42:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:42:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 21:42:09,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-21 21:42:09,822 INFO L175 Difference]: Start difference. First operand has 359 places, 498 transitions, 7910 flow. Second operand 11 states and 183 transitions. [2024-06-21 21:42:09,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 542 transitions, 9270 flow [2024-06-21 21:42:13,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 542 transitions, 8767 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-21 21:42:13,094 INFO L231 Difference]: Finished difference. Result has 363 places, 498 transitions, 7631 flow [2024-06-21 21:42:13,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7407, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7631, PETRI_PLACES=363, PETRI_TRANSITIONS=498} [2024-06-21 21:42:13,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-21 21:42:13,094 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 498 transitions, 7631 flow [2024-06-21 21:42:13,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:13,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:13,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:13,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:42:13,095 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:13,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1625771627, now seen corresponding path program 5 times [2024-06-21 21:42:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972160598] [2024-06-21 21:42:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:17,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:17,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972160598] [2024-06-21 21:42:17,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972160598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:17,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:17,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:17,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425852978] [2024-06-21 21:42:17,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:17,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:17,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:17,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:17,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 498 transitions, 7631 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:17,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:17,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:17,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:20,804 INFO L124 PetriNetUnfolderBase]: 7475/11862 cut-off events. [2024-06-21 21:42:20,804 INFO L125 PetriNetUnfolderBase]: For 1642651/1642653 co-relation queries the response was YES. [2024-06-21 21:42:20,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98685 conditions, 11862 events. 7475/11862 cut-off events. For 1642651/1642653 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 79417 event pairs, 2800 based on Foata normal form. 4/11865 useless extension candidates. Maximal degree in co-relation 98526. Up to 10386 conditions per place. [2024-06-21 21:42:20,996 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 317 selfloop transitions, 222 changer transitions 0/543 dead transitions. [2024-06-21 21:42:20,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 543 transitions, 9237 flow [2024-06-21 21:42:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:42:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:42:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 21:42:20,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-21 21:42:20,997 INFO L175 Difference]: Start difference. First operand has 363 places, 498 transitions, 7631 flow. Second operand 11 states and 193 transitions. [2024-06-21 21:42:20,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 543 transitions, 9237 flow [2024-06-21 21:42:24,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 543 transitions, 8914 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-21 21:42:24,535 INFO L231 Difference]: Finished difference. Result has 364 places, 498 transitions, 7758 flow [2024-06-21 21:42:24,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7758, PETRI_PLACES=364, PETRI_TRANSITIONS=498} [2024-06-21 21:42:24,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-21 21:42:24,535 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 498 transitions, 7758 flow [2024-06-21 21:42:24,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:24,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:24,536 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 21:42:24,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:42:24,536 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:24,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash 108022889, now seen corresponding path program 5 times [2024-06-21 21:42:24,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:24,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019119050] [2024-06-21 21:42:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:24,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:28,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:28,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019119050] [2024-06-21 21:42:28,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019119050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:28,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:28,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:28,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224298375] [2024-06-21 21:42:28,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:28,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:28,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:28,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 498 transitions, 7758 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:28,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:28,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:28,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:32,187 INFO L124 PetriNetUnfolderBase]: 7606/12075 cut-off events. [2024-06-21 21:42:32,187 INFO L125 PetriNetUnfolderBase]: For 1715508/1715510 co-relation queries the response was YES. [2024-06-21 21:42:32,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101464 conditions, 12075 events. 7606/12075 cut-off events. For 1715508/1715510 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 81020 event pairs, 3003 based on Foata normal form. 8/12082 useless extension candidates. Maximal degree in co-relation 101304. Up to 11401 conditions per place. [2024-06-21 21:42:32,361 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 415 selfloop transitions, 129 changer transitions 1/549 dead transitions. [2024-06-21 21:42:32,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 549 transitions, 9421 flow [2024-06-21 21:42:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:42:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:42:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-21 21:42:32,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-21 21:42:32,362 INFO L175 Difference]: Start difference. First operand has 364 places, 498 transitions, 7758 flow. Second operand 11 states and 178 transitions. [2024-06-21 21:42:32,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 549 transitions, 9421 flow [2024-06-21 21:42:36,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 549 transitions, 8920 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:42:36,268 INFO L231 Difference]: Finished difference. Result has 366 places, 514 transitions, 7841 flow [2024-06-21 21:42:36,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7296, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7841, PETRI_PLACES=366, PETRI_TRANSITIONS=514} [2024-06-21 21:42:36,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-21 21:42:36,268 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 514 transitions, 7841 flow [2024-06-21 21:42:36,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:36,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:36,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:36,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:42:36,269 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:36,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1622046791, now seen corresponding path program 6 times [2024-06-21 21:42:36,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:36,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334779353] [2024-06-21 21:42:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:36,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:40,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:40,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334779353] [2024-06-21 21:42:40,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334779353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:40,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:40,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:40,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287360303] [2024-06-21 21:42:40,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:40,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:40,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:40,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 514 transitions, 7841 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:40,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:40,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:40,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:44,078 INFO L124 PetriNetUnfolderBase]: 7576/12035 cut-off events. [2024-06-21 21:42:44,078 INFO L125 PetriNetUnfolderBase]: For 1726573/1726575 co-relation queries the response was YES. [2024-06-21 21:42:44,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100563 conditions, 12035 events. 7576/12035 cut-off events. For 1726573/1726575 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 80861 event pairs, 2996 based on Foata normal form. 8/12042 useless extension candidates. Maximal degree in co-relation 100401. Up to 11382 conditions per place. [2024-06-21 21:42:44,235 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 410 selfloop transitions, 130 changer transitions 2/546 dead transitions. [2024-06-21 21:42:44,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 546 transitions, 9023 flow [2024-06-21 21:42:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:42:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:42:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:42:44,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:42:44,236 INFO L175 Difference]: Start difference. First operand has 366 places, 514 transitions, 7841 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:42:44,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 546 transitions, 9023 flow [2024-06-21 21:42:47,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 546 transitions, 8881 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:47,715 INFO L231 Difference]: Finished difference. Result has 371 places, 513 transitions, 7953 flow [2024-06-21 21:42:47,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7699, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7953, PETRI_PLACES=371, PETRI_TRANSITIONS=513} [2024-06-21 21:42:47,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 21:42:47,716 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 513 transitions, 7953 flow [2024-06-21 21:42:47,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:47,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:47,716 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 21:42:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:42:47,716 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:47,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1478156261, now seen corresponding path program 7 times [2024-06-21 21:42:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527140501] [2024-06-21 21:42:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:51,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527140501] [2024-06-21 21:42:51,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527140501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:51,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:51,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:42:51,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662621358] [2024-06-21 21:42:51,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:51,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:42:51,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:42:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:42:51,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:42:51,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 513 transitions, 7953 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:42:51,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:51,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:42:51,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:55,147 INFO L124 PetriNetUnfolderBase]: 7907/12511 cut-off events. [2024-06-21 21:42:55,147 INFO L125 PetriNetUnfolderBase]: For 1859215/1859217 co-relation queries the response was YES. [2024-06-21 21:42:55,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106767 conditions, 12511 events. 7907/12511 cut-off events. For 1859215/1859217 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 84025 event pairs, 2959 based on Foata normal form. 8/12518 useless extension candidates. Maximal degree in co-relation 106603. Up to 11435 conditions per place. [2024-06-21 21:42:55,336 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 402 selfloop transitions, 188 changer transitions 1/595 dead transitions. [2024-06-21 21:42:55,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 595 transitions, 10609 flow [2024-06-21 21:42:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:42:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:42:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-21 21:42:55,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-21 21:42:55,339 INFO L175 Difference]: Start difference. First operand has 371 places, 513 transitions, 7953 flow. Second operand 11 states and 182 transitions. [2024-06-21 21:42:55,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 595 transitions, 10609 flow [2024-06-21 21:43:00,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 595 transitions, 10345 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:00,603 INFO L231 Difference]: Finished difference. Result has 378 places, 556 transitions, 9026 flow [2024-06-21 21:43:00,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7707, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9026, PETRI_PLACES=378, PETRI_TRANSITIONS=556} [2024-06-21 21:43:00,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 21:43:00,603 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 556 transitions, 9026 flow [2024-06-21 21:43:00,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:43:00,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:00,604 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 21:43:00,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:43:00,604 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:00,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash 514007753, now seen corresponding path program 8 times [2024-06-21 21:43:00,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:00,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500560257] [2024-06-21 21:43:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:00,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:04,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:04,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500560257] [2024-06-21 21:43:04,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500560257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:04,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:04,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:04,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139638263] [2024-06-21 21:43:04,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:04,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:04,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:04,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:04,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:04,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:04,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 556 transitions, 9026 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:43:04,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:04,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:04,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:09,279 INFO L124 PetriNetUnfolderBase]: 8583/13542 cut-off events. [2024-06-21 21:43:09,279 INFO L125 PetriNetUnfolderBase]: For 1960565/1960575 co-relation queries the response was YES. [2024-06-21 21:43:09,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118254 conditions, 13542 events. 8583/13542 cut-off events. For 1960565/1960575 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 91535 event pairs, 3116 based on Foata normal form. 10/13551 useless extension candidates. Maximal degree in co-relation 118086. Up to 12328 conditions per place. [2024-06-21 21:43:09,462 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 502 selfloop transitions, 230 changer transitions 1/737 dead transitions. [2024-06-21 21:43:09,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 737 transitions, 14149 flow [2024-06-21 21:43:09,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:43:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:43:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-21 21:43:09,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-21 21:43:09,464 INFO L175 Difference]: Start difference. First operand has 378 places, 556 transitions, 9026 flow. Second operand 13 states and 203 transitions. [2024-06-21 21:43:09,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 737 transitions, 14149 flow [2024-06-21 21:43:14,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 737 transitions, 13789 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-21 21:43:14,523 INFO L231 Difference]: Finished difference. Result has 394 places, 678 transitions, 12084 flow [2024-06-21 21:43:14,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8798, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12084, PETRI_PLACES=394, PETRI_TRANSITIONS=678} [2024-06-21 21:43:14,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 21:43:14,524 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 678 transitions, 12084 flow [2024-06-21 21:43:14,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:43:14,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:14,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:14,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:43:14,524 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:14,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash -734949303, now seen corresponding path program 9 times [2024-06-21 21:43:14,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:14,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486782036] [2024-06-21 21:43:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:18,467 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 21:43:18,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:18,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486782036] [2024-06-21 21:43:18,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486782036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:18,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:18,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:18,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085779514] [2024-06-21 21:43:18,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:18,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:18,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:18,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:18,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 678 transitions, 12084 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:43:18,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:18,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:18,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:23,243 INFO L124 PetriNetUnfolderBase]: 8559/13505 cut-off events. [2024-06-21 21:43:23,243 INFO L125 PetriNetUnfolderBase]: For 1980578/1980580 co-relation queries the response was YES. [2024-06-21 21:43:23,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118843 conditions, 13505 events. 8559/13505 cut-off events. For 1980578/1980580 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 91232 event pairs, 2979 based on Foata normal form. 6/13510 useless extension candidates. Maximal degree in co-relation 118668. Up to 11850 conditions per place. [2024-06-21 21:43:23,435 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 400 selfloop transitions, 306 changer transitions 2/712 dead transitions. [2024-06-21 21:43:23,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 712 transitions, 14004 flow [2024-06-21 21:43:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:43:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:43:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 21:43:23,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-21 21:43:23,436 INFO L175 Difference]: Start difference. First operand has 394 places, 678 transitions, 12084 flow. Second operand 10 states and 163 transitions. [2024-06-21 21:43:23,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 712 transitions, 14004 flow [2024-06-21 21:43:29,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 712 transitions, 13641 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:29,066 INFO L231 Difference]: Finished difference. Result has 403 places, 681 transitions, 12618 flow [2024-06-21 21:43:29,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11721, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12618, PETRI_PLACES=403, PETRI_TRANSITIONS=681} [2024-06-21 21:43:29,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-21 21:43:29,067 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 681 transitions, 12618 flow [2024-06-21 21:43:29,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:43:29,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:29,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:29,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:43:29,067 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:29,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:29,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1122420545, now seen corresponding path program 10 times [2024-06-21 21:43:29,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:29,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453535206] [2024-06-21 21:43:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:29,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:33,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:33,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453535206] [2024-06-21 21:43:33,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453535206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:33,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:33,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:33,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013584794] [2024-06-21 21:43:33,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:33,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:33,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:33,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:33,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:33,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 21:43:33,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 681 transitions, 12618 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:43:33,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:33,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 21:43:33,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:38,694 INFO L124 PetriNetUnfolderBase]: 8571/13522 cut-off events. [2024-06-21 21:43:38,695 INFO L125 PetriNetUnfolderBase]: For 2024098/2024098 co-relation queries the response was YES. [2024-06-21 21:43:38,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121140 conditions, 13522 events. 8571/13522 cut-off events. For 2024098/2024098 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 91314 event pairs, 3131 based on Foata normal form. 4/13525 useless extension candidates. Maximal degree in co-relation 120960. Up to 12859 conditions per place. [2024-06-21 21:43:38,884 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 610 selfloop transitions, 111 changer transitions 1/726 dead transitions. [2024-06-21 21:43:38,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 726 transitions, 14814 flow [2024-06-21 21:43:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:43:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:43:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 193 transitions. [2024-06-21 21:43:38,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3534798534798535 [2024-06-21 21:43:38,886 INFO L175 Difference]: Start difference. First operand has 403 places, 681 transitions, 12618 flow. Second operand 13 states and 193 transitions. [2024-06-21 21:43:38,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 726 transitions, 14814 flow [2024-06-21 21:43:45,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 726 transitions, 14413 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:45,319 INFO L231 Difference]: Finished difference. Result has 411 places, 691 transitions, 12733 flow [2024-06-21 21:43:45,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12227, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12733, PETRI_PLACES=411, PETRI_TRANSITIONS=691} [2024-06-21 21:43:45,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-21 21:43:45,320 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 691 transitions, 12733 flow [2024-06-21 21:43:45,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 21:43:45,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:45,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:45,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:43:45,320 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:45,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:45,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1311375553, now seen corresponding path program 11 times [2024-06-21 21:43:45,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:45,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568753812] [2024-06-21 21:43:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:45,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat